feat(format): Add --diff option to format command to display file diffs; pass flag through CLI and show formatter diffs. Bump @git.zone/tsdoc to ^1.11.0.

ts/mod_format/index.ts

@@ -29,6 +29,7 @@ export let run = async (
     interactive?: boolean;
     parallel?: boolean;
     verbose?: boolean;
+    diff?: boolean;       // Show file diffs
   } = {},
 ): Promise<any> => {
   // Set verbose mode if requested
@@ -132,6 +133,21 @@ export let run = async (
       return;
     }
 
+    // Show diffs if requested (works in both dry-run and write modes)
+    if (options.diff) {
+      logger.log('info', 'Showing file diffs:');
+      console.log('');
+
+      for (const formatter of activeFormatters) {
+        const checkResult = await formatter.check();
+        if (checkResult.hasDiff) {
+          logger.log('info', `[${formatter.name}]`);
+          formatter.displayAllDiffs(checkResult);
+          console.log('');
+        }
+      }
+    }
+
     // Dry-run mode (default behavior)
     if (!shouldWrite) {
       logger.log('info', 'Dry-run mode - use --write (-w) to apply changes');