feat: add user-tweets command to fetch tweets from a user's profile

Adds new CLI command to fetch tweets from any user's profile timeline.

Usage:
  bird user-tweets @username [-n count] [--pages N] [--json]

Features:
- GraphQL UserByScreenName for username → userId resolution
- Cursor-based pagination with configurable delay (rate-limit safe)
- Hard cap of 10 pages to prevent abuse
- Input validation via normalizeHandle()

Includes 17 unit tests and live smoke test.

Co-authored-by: Christian Catalan <[email protected]>

src/cli/program.ts

@@ -9,6 +9,7 @@ import { registerQueryIdsCommand } from '../commands/query-ids.js';
 import { registerReadCommands } from '../commands/read.js';
 import { registerSearchCommands } from '../commands/search.js';
 import { registerUnbookmarkCommand } from '../commands/unbookmark.js';
+import { registerUserTweetsCommand } from '../commands/user-tweets.js';
 import { registerUserCommands } from '../commands/users.js';
 import { getCliVersion } from '../lib/version.js';
 import { type CliContext, collectCookieSource } from './shared.js';
@@ -30,6 +31,7 @@ export const KNOWN_COMMANDS = new Set([
   'lists',
   'list-timeline',
   'home',
+  'user-tweets',
   'help',
   'whoami',
   'check',
@@ -88,7 +90,7 @@ export function createProgram(ctx: CliContext): Command {
       ].join('\n\n')}\n\n${ctx.colors.section('Shortcuts')}\n${[
         formatExample('bird <tweet-id-or-url> [--json]', 'Shorthand for `bird read <tweet-id-or-url>`'),
       ].join('\n\n')}\n\n${ctx.colors.section('JSON Output')}\n${ctx.colors.muted(
-        `  Add ${ctx.colors.option('--json')} to: read, replies, thread, search, mentions, bookmarks, likes, following, followers, lists, list-timeline, query-ids`,
+        `  Add ${ctx.colors.option('--json')} to: read, replies, thread, search, mentions, bookmarks, likes, following, followers, lists, list-timeline, user-tweets, query-ids`,
       )}\n${ctx.colors.muted(
         `  Add ${ctx.colors.option('--json-full')} to include raw API response in ${ctx.colors.argument('_raw')} field (tweet commands only)`,
       )}\n${ctx.colors.muted(`  (Run ${ctx.colors.command('bird <command> --help')} to see per-command flags.)`)}`,
@@ -135,6 +137,7 @@ export function createProgram(ctx: CliContext): Command {
   registerListsCommand(program, ctx);
   registerHomeCommand(program, ctx);
   registerUserCommands(program, ctx);
+  registerUserTweetsCommand(program, ctx);
   registerCheckCommand(program, ctx);
 
   return program;