Enable PHP autoindent and smartindent settings

Re-enable autoindent and smartindent for PHP files to ensure
proper indentation according to WordPress coding standards.

lua/plugins/treesitter.lua

@@ -58,9 +58,12 @@ return {
           },
         },
         
-        -- Indentation (experimental, disable if issues)
+        -- Indentation: Enable for languages with good indent queries
+        -- PHP requires this because GetPhpIndent() depends on Vim syntax (disabled by Treesitter)
         indent = {
-          enable = false, -- Start disabled; can enable per-filetype if stable
+          enable = true,
+          -- Disable for languages with poor/incomplete indent queries if needed
+          disable = {},
         },
         
         -- Textobjects