feat: Add support for Biome formatter

nix/neovim-overlay.nix

@@ -129,6 +129,7 @@ with final.pkgs.lib; let
     # Formatters
     shfmt
     stylua
+    biome
   ];
 in {
   # This is the neovim derivation returned by the overlay.

nvim/lua/plugins/formatting/conform-nvim.lua

@@ -31,10 +31,26 @@ return {
 
         return { timeout_ms = 3000, lsp_format = 'fallback' }
       end,
+
       formatters_by_ft = {
-        lua = { 'stylua' },
+        css = { 'biome' },
         fish = { 'fish_indent' },
+        graphql = { 'biome' },
+        javascript = { 'biome' },
+        javascriptreact = { 'biome' },
+        json = { 'biome' },
+        jsonc = { 'biome' },
+        lua = { 'stylua' },
         sh = { 'shfmt' },
+        typescript = { 'biome' },
+        typescriptreact = { 'biome' },
+        vue = { 'biome' },
+      },
+
+      formatters = {
+        biome = {
+          require_cwd = true,
+        },
       },
     })