refactor(cli): colocate --help examples in command files (#202)

Move per-command examples from the centralized `help.ts` record into
each command file as `export const examples: Example[]`. help.ts now
dynamically imports them at --help time.

This means adding a new command and its examples happens in one file
instead of two, reducing the chance of forgetting examples.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/init.ts

@@ -1,4 +1,13 @@
 import { defineCommand, runCommand } from "citty";
+import type { Example } from "./_examples.js";
+
+export const examples: Example[] = [
+  ["Create a project with the interactive wizard", "hyperframes init my-video"],
+  ["Pick a starter template", "hyperframes init my-video --template warm-grain"],
+  ["Start from an existing video file", "hyperframes init my-video --video clip.mp4"],
+  ["Start from an audio file", "hyperframes init my-video --audio track.mp3"],
+  ["Non-interactive mode (for CI or AI agents)", "hyperframes init my-video --non-interactive"],
+];
 import {
   existsSync,
   mkdirSync,