Only silence jscodeshift runner in tests, not in production (#359)

The `silent: true` option was hardcoded in `runTransform`, suppressing
jscodeshift output even for real CLI usage. Add an opt-in `silent`
option to `RunTransformOptions` (default false) and pass it through.
Tests explicitly set `silent: true`.

https://claude.ai/code/session_019oLJbbZntnGzsugStNT2Hf

Co-authored-by: Claude <noreply@anthropic.com>

Author: skovhus

src/__tests__/run-prepass-failure-contract.test.ts

@@ -144,6 +144,7 @@ describe("runTransform prepass failure contract", () => {
       consumerPaths: SAMPLE_FILE,
       adapter,
       dryRun: true,
+      silent: true,
     });
     await expect(execution).rejects.toThrowError(
       /prepass failed while using externalInterface: "auto"/i,
@@ -188,6 +189,7 @@ describe("runTransform prepass failure contract", () => {
       consumerPaths: SAMPLE_FILE,
       adapter,
       dryRun: true,
+      silent: true,
     });
 
     expect(result.errors).toBe(0);

src/__tests__/run.e2e.test.ts

@@ -55,6 +55,7 @@ describe("runTransform (e2e)", () => {
       dryRun: false,
       print: false,
       parser: "tsx",
+      silent: true,
     });
 
     expect(result.errors).toBe(0);

src/run.ts

@@ -90,6 +90,12 @@ export interface RunTransformOptions {
    * @default 3
    */
   maxExamples?: number;
+
+  /**
+   * Suppress jscodeshift runner output.
+   * @default false
+   */
+  silent?: boolean;
 }
 
 export interface RunTransformResult {
@@ -478,7 +484,7 @@ export async function runTransform(options: RunTransformOptions): Promise<RunTra
     // Programmatic use passes an Adapter object (functions). That cannot be
     // serialized across process boundaries, so we must run in-band.
     runInBand: true,
-    silent: true,
+    silent: options.silent ?? false,
   });
 
   // Write sidecar .stylex.ts files (defineMarker declarations)