redesign themeing system

This is a complete redesign of Ayllu's themeing system as well as it's default
theme and documentation site.

New features include:

* Ability to mix between built-in compiled and user provided external themes.
* Lightning CSS[1] support eliminating the need for sassc.
* Change from picocss to Open Props[2] which has better support for user
themeing.
* Additional ability to customize all SVG contents used in the UI.
* Ability to customize RSS pages via a theme based XSL file.
* General readability and design improvements (thanks toastal).
* Improvements for using legacy browsers like Dillo, Lynx, etc.
* Some accessibility improvements (WIP still).

1. https://lightningcss.dev/
2. https://open-props.style/

remove mention of tree-sitter-amalgamation

tree-sitter-amalgamation is no longer needed because distribution packaging
of tree-sitter parsers has improved.

add multiuser container

This adds a container for production deployments with use with multiple users
in a shared environment. Full design is still a WIP.

add initial support for running ayllu via podman

This adds the basic tooling to support container based workflows with Podman.
It only adds the ability to run the basic ayllu/quipu components without
support for mail, chat, etc. those components will come after.

improve development scripts for database creation

This standardizes the creation of sqlite databases for use in testing and
the compilation process.

Prior to compiling each component you need to:

Usage:

scripts/ensure-db.sh $COMPONENT

add support for smart_http git cloning

This adds support for calling git-http-backend via a CGI like interface in
Ayllu which means that running an external fcgiwrap like service is no longer
required. The implementation is based on https://github.com/w4/rgit which is
an excellent Rust based cgit clone.

init quipu

Implement a rough draft of Quipu - the CLI and RPC client for Ayllu. This adds
a simple REST server into the existing Ayllu HTTP server as well as a new
binary called quipu for interacting with the new endpoints. Eventually I would
like to implement a custom transport built on Tarpc expose both the REST API
and the internal RPC communication if desired.

add commits_range_between and branches range

Adds two new git related methods for resolving the commits between two
commits and returning branches within a certain range. This is being added
to support new UI and RSS features.

rewrite tree-sitter module names to use snake_case

This changes the tree-sitter module loader to re-write function calls as
snake_case as is the convention in tree-sitter. For example the module
/usr/lib/libtree-sitter-markdown-inline.so will be re-written try calling the
method tree_sitter_markdown_inline()

Replace capnp with tarpc

This replaces the capnp RPC implementation with tarpc. Tarpc requires far less
boilerplate and simplifies the codebase considerably.

rm gitbug entirely from the project

Gitbug is an awesome project that has a lot of promise however it doesn't fit
well with Ayllu since it has no Rust library and it uses a Go based key value
store on the file system which cannot be interoperated with.

use a standard git global config for test helper

This adds a basic global git config to avoid conflicting with the testing
user's gitconfig e.g. attempting to GPG sign test commits.

add option to tee build output for debugging purposes

ayllu-build evaluate now supports a --tee-output flag which will write the
executor output to the caller's stdout/stderr for debugging purposes.

do not generate summary pages with no content

RSS feeds no longer will generate a summary item if no activities happened
within the timeframe.

make rss ttl fixed and configurable

This lets the user specify the TTL in the RSS response by the server.
Additionally the tests have been refactored to use a fixed timestamp instead
of being based on the current time. This was needed because two sequential
commits at the same second will cause the tests to periodically fail since
epoch times will overlap.

fix regression in error handler

This fixes a regression I introduced into the error handler, it also
simplifies what was a very confusing design.

improve refs ui and navigation

The refs page for both tags and branches was confusing to look at and linked
directly to commits instead of /tree/$ref. This change cleans up the UI/UX and
fixes the links.

refactor rss to rely on timeframes instead of ttl

Previously the RSS summary page was relying on the TTL field of the feed for
clients however TTL is not widely supported. This refactors the summary page
to show the previous day, week, or month and roll over at a fixed interval.

Additionally this fixes an issue with Wrapper.commit_range returning the wrong
results.

improve language detection heuristics & general syntax highlighting

Language detection and syntax highlighting has now been generally refactored
and improved to include the support of shebang lines and highlighting specific
files e.g. .bashrc

several improvements for packaging, docs, & tree-sitter architecture

This change includes various quality of life updates when installing Ayllu on
a clean system. Notably the ability to generate a template config file,
validate it, and improve config related error messages.

This change also contains a major overhaul for tree-sitter support:

* prefer packaged parsers on various Linux distributions
* allow overriding individual syntax queries
* support language injection / "local" queries in tree-sitter
* add the ability to support custom parsers and programming languages

Language detection also has a few changes:

* ability to change language colors
* ability to update/override extensions for language detection

Rewrite main command line configuration option parser

Signed-off-by: Manos Pitsidianakis <manos@pitsidianak.is>

working local support for ayllu-builder

This change adds basic functional support for running ayllu-build locally.
Still have a way to go for the finishing the complete system and exposing it
in the web interface. Currently all parallelism is disabled while I get a
functioning prototype.

avoid panic when serving static content; fix default static paths

This fixes a panic that started occuring when I added the /docs page to the
Ayllu home page due to crates/git attempting to read all paths as blobs when
serving static assets. Additionally the following logic was added for how the
static server should attempt to load content.

The server will try the following paths:

GET /fuu
GET /fuu/index.html
GET /fuu/index.htm
GET /fuu.html
GET /fuu.htm