chore: add project configs

- Add CI workflows (format, lint, typecheck)
- Add quality workflow
- Add luarocks publishing workflow
- Add pre-commit configuration
- Add issue templates (bug report, feature request)
- Add .editorconfig, .gitignore, .luarc.json
- Add selene.toml and vim.toml for linting
- Add luarocks rockspec
- Rename .stylua.toml to stylua.toml

http-codes.nvim-scm-1.rockspec

@@ -0,0 +1,12 @@
+rockspec_format = '3.0'
+package = 'http-codes.nvim'
+version = 'scm-1'
+
+source = { url = 'git://github.com/barrettruth/http-codes.nvim' }
+build = { type = 'builtin' }
+
+test_dependencies = {
+  'lua >= 5.1',
+  'nlua',
+  'busted >= 2.1.1',
+}