nvim: Add mdx filetype support

Added suport for the mdx filetype. With the mdx.nvim plugin it will be
recognized and applied to `*.mdx` files. The plugin also associates the
markdown parser with it, and adds some queries for mdx features.

Lastly, added mdx to the list of markdown-like languages in our prose
module so plugins like render-markdown also recognize the language and
work with it.

nvim/.config/nvim/lazy-lock.json

@@ -48,6 +48,7 @@
   "mason.nvim": { "branch": "main", "commit": "7f265cd6ae56cecdd0aa50c8c73fc593b0604801" },
   "mcphub.nvim": { "branch": "main", "commit": "85a7a659fc82da1429a2241ab61e9ce07b3db374" },
   "mdeval.nvim": { "branch": "master", "commit": "0e1b248db174a9659a9ab16eb8c90ff3aec55264" },
+  "mdx.nvim": { "branch": "main", "commit": "464a74be368dce212cff02f6305845dc7f209ab3" },
   "mini.base16": { "branch": "main", "commit": "2eb2d2b889a8c861d1a66ec651bd0edb417d5c7f" },
   "mini.files": { "branch": "main", "commit": "49c855977e9f4821d1ed8179ed44fe098b93ea2a" },
   "mini.nvim": { "branch": "main", "commit": "94cae4660a8b2d95dbbd56e1fbc6fcfa2716d152" },

nvim/.config/nvim/lua/plugins/prose.lua

@@ -13,6 +13,7 @@ end
 
 local md_like = {
 	"markdown",
+	"mdx",
 	"djot",
 	"pandoc",
 	"quarto",
@@ -345,6 +346,12 @@ local prose_plugs = {
 		branch = "dev",
 	},
 	{ "let-def/texpresso.vim", ft = { "tex" } },
+	{
+		"davidmh/mdx.nvim",
+		config = true,
+		dependencies = { "nvim-treesitter/nvim-treesitter" },
+		event = { "BufEnter *.mdx" }, -- since the plug itself defines mdx ft
+	},
 }
 
 return prose_plugs