Neovim setup

Can it be this easy to make nvim stuff just work? Do I really just need
to pull the files in with Home Manager? It seems so, so long as nvim
knows about gcc :)

There is also a related side of tmux here because it all ties together.

modules/home-manager/files/nvim/lua/plugins/mason-null-ls.lua

@@ -0,0 +1,17 @@
+return {
+  "jay-babu/mason-null-ls.nvim",
+  event = { "BufReadPre", "BufNewFile" },
+  dependencies = {
+    "williamboman/mason.nvim",
+    "nvimtools/none-ls.nvim",
+  },
+  config = function()
+    require("mason-null-ls").setup({
+      ensure_installed = {
+        "prettier", -- HTML, JS, JSON, etc.
+        "ruff",     -- Pyhton
+        "stylua",   -- LUA
+      },
+    })
+  end,
+}