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/none-ls.lua

@@ -0,0 +1,23 @@
+return {
+  "nvimtools/none-ls.nvim",
+  dependencies = { "nvim-lua/plenary.nvim" },
+  config = function()
+    local null_ls = require("null-ls")
+
+    null_ls.setup({
+      sources = {
+        null_ls.builtins.completion.spell,
+        null_ls.builtins.diagnostics.puppet_lint,
+        null_ls.builtins.diagnostics.rubocop,
+        null_ls.builtins.diagnostics.ruff,
+        null_ls.builtins.formatting.prettier,
+        null_ls.builtins.formatting.puppet_lint,
+        null_ls.builtins.formatting.rubocop,
+        null_ls.builtins.formatting.ruff_format,
+        null_ls.builtins.formatting.stylua,
+      },
+    })
+
+    vim.keymap.set("n", "<leader>gf", vim.lsp.buf.format, {})
+  end,
+}