docs: convert all skill instructions from npm to pnpm

Batch update 62 files across .claude/skills/ — SKILL.md, REMOVE.md,
and script files. Conversions: npm run -> pnpm run, npm install ->
pnpm install, npx -> pnpm exec/dlx, npm uninstall -> pnpm uninstall,
package-lock.json -> pnpm-lock.yaml, shebangs updated.

.claude/skills/x-integration/scripts/like.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Like Tweet
- * Usage: echo '{"tweetUrl":"https://x.com/user/status/123"}' | npx tsx like.ts
+ * Usage: echo '{"tweetUrl":"https://x.com/user/status/123"}' | pnpm exec tsx like.ts
  */
 
 import { getBrowserContext, navigateToTweet, runScript, config, ScriptResult } from '../lib/browser.js';

.claude/skills/x-integration/scripts/post.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Post Tweet
- * Usage: echo '{"content":"Hello world"}' | npx tsx post.ts
+ * Usage: echo '{"content":"Hello world"}' | pnpm exec tsx post.ts
  */
 
 import { getBrowserContext, runScript, validateContent, config, ScriptResult } from '../lib/browser.js';

.claude/skills/x-integration/scripts/quote.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Quote Tweet
- * Usage: echo '{"tweetUrl":"https://x.com/user/status/123","comment":"My thoughts"}' | npx tsx quote.ts
+ * Usage: echo '{"tweetUrl":"https://x.com/user/status/123","comment":"My thoughts"}' | pnpm exec tsx quote.ts
  */
 
 import { getBrowserContext, navigateToTweet, runScript, validateContent, config, ScriptResult } from '../lib/browser.js';

.claude/skills/x-integration/scripts/reply.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Reply to Tweet
- * Usage: echo '{"tweetUrl":"https://x.com/user/status/123","content":"Great post!"}' | npx tsx reply.ts
+ * Usage: echo '{"tweetUrl":"https://x.com/user/status/123","content":"Great post!"}' | pnpm exec tsx reply.ts
  */
 
 import { getBrowserContext, navigateToTweet, runScript, validateContent, config, ScriptResult } from '../lib/browser.js';

.claude/skills/x-integration/scripts/retweet.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Retweet
- * Usage: echo '{"tweetUrl":"https://x.com/user/status/123"}' | npx tsx retweet.ts
+ * Usage: echo '{"tweetUrl":"https://x.com/user/status/123"}' | pnpm exec tsx retweet.ts
  */
 
 import { getBrowserContext, navigateToTweet, runScript, config, ScriptResult } from '../lib/browser.js';

.claude/skills/x-integration/scripts/setup.ts

@@ -1,7 +1,7 @@
-#!/usr/bin/env npx tsx
+#!/usr/bin/env pnpm exec tsx
 /**
  * X Integration - Authentication Setup
- * Usage: npx tsx setup.ts
+ * Usage: pnpm exec tsx setup.ts
  *
  * Interactive script - opens browser for manual login
  */