Cache gem install fontist, cache ~/.fontist, and add semver support

[jcbhmr]

This PR would:

1. use javascript instead of composite
2. use bun to bundle the code into a single file (dependencies included)
3. update github actions to have a build step upon releases
4. STILL REQUIRE THAT A GOOD VERSION OF RUBY IS USED see Isolate Ruby installation from system ruby version #5 -- idea to have own Ruby install location was abandoned; can be revisisted -- its not that hard to do now that i did it once
5. first check $RUNNER_TOOL_CACHE for fontist
6. if cache: true and if no tool cache, try to restore from workflow cache
7. if still no fontist, resort to gem install fontist with custom --install-dir to avoid contaminating user's rubygems install location
8. create wrapper fontist and fontist.cmd scripts which proxy to the --install-dir location with some magic env vars set to load the library .rb files from the --install-dir instead of the global default spot
9. if cache: true and no cache content then try to stash in cache
10. hashFiles() of manifest.yml or manifest.yaml in the root folder. this is overridable by the user via cache-dependency-path just like setup-node
11. use hashFiles() as part of the cache key to try and restore ~/.fontist from cache; can fail if no current cache (which is OK)
12. run fontist update to refresh any outdated cache stuffs
13. POST RUN: save current filled ~/.fontist to cache with hashFiles() cach key from before; can fail if cache already exists (which is OK)

fix #9
fix #8
fix #7
fix #1
basically does a good amount of caching and adds semver version support

[jcbhmr]

i think the logic and results look good but id like someone else to review this ❤️

(yes this pr has changed names and purposes like 5 times lol 😆 )

[ronaldtse]

Thank you @jcbhmr for this!

@CAMOBAP @alexeymorozov could you please help review and merge this? Thanks!

[CAMOBAP]

Are there some issues on Windows discovered?

[ronaldtse]

It's because bun is not supported on Windows.

[CAMOBAP]

Good Job!

Few minor comments added

[ronaldtse]

Thank you @jcbhmr !

[ronaldtse]

@CAMOBAP we can probably start using this action for our Metanorma actions!