feat(neovim): add code formatter plugin

modules/home-manager/cli/neovim/default.nix

@@ -80,6 +80,11 @@ in
         cmp-path
         cmp-cmdline
         cmp_luasnip
+        {
+          plugin = conform-nvim;
+          type = "lua";
+          config = (builtins.readFile ./files/conform.lua);
+        }
         {
           plugin = fzf-lua;
           type = "lua";

modules/home-manager/cli/neovim/files/conform.lua

@@ -0,0 +1,11 @@
+require("conform").setup({
+  format_on_save = {
+    -- These options will be passed to conform.format()
+    timeout_ms = 500,
+    lsp_format = "never",
+  },
+  formatters_by_ft = {
+    yaml = {"yamlfmt"},
+    ["_"] = { "trim_whitespace" },
+  }
+})