feat: luarocks support

[mrcjkb]

nui.nvim is a common dependency across Neovim plugins. Using luarocks may alleviate the need for users to specify their plugins' dependencies in their plugin manager (e.g., vim-plug or packer). See also this blog post for details.

Things done:

• Add a workflow that publishes tags to LuaRocks whenever a tag is pushed.
• Add a LuaRocks shield to the readme (assumes the existence of an MunifTanjim/nui.nvim LuaRocks package).

Notes

• For the release workflow to work, someone with a Luarocks account will have to add their API key to this repo's GitHub actions secrets.
• Due to a shortcoming in LuaRocks (https://github.com/luarocks/luarocks-site/issues/188), the neovim label has to be added manually, for this plugin to show up in https://luarocks.org/labels/neovim
• If you would prefer rolling releases without tags, this is also possible.

[codecov[bot]]

Codecov Report

Merging #238 (566ec86) into main (0dc148c) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 566ec86 differs from pull request most recent head da64e49. Consider uploading reports for the commit da64e49 to get more accurate results

@@           Coverage Diff           @@
##             main     #238   +/-   ##
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  Coverage   98.11%   98.11%           
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  Files          19       19           
  Lines        2329     2329           
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  Hits         2285     2285           
  Misses         44       44           

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[MunifTanjim]

Hey @mrcjkb, apologies for replying so late. I've used a more general purpose luarocks publish action for this. And nui.nvim release and publish to luarocks is now automated.

Gonna close this PR. Thanks for nudging me towards doing this 😃

[mrcjkb]

Awesome! Thanks for supporting the luarocks workflow :smile: