feat(fzf): use delta previewer for code actions when available

lua/lazyvim/plugins/extras/editor/fzf.lua

@@ -108,6 +108,9 @@ return {
             end,
             child_prefix = false,
           },
+          code_actions = {
+            previewer = vim.fn.executable("delta") == 1 and "codeaction_native" or nil,
+          },
         },
         formatters = {
           path = {