fix: resolve ESLint errors and update tests for project-name fallback

- Fix 16 ESLint no-unused-vars errors across hook scripts and tests
- Add eslint-disable comment for intentional control-regex in ANSI stripper
- Update session file test to use getSessionIdShort() instead of hardcoded 'default'
  (reflects PR #110's project-name fallback behavior)
- Add marketing/ to .gitignore (local drafts)
- Add skill-create-output.js (terminal output formatter)

All 69 tests now pass. CI should be green.

scripts/setup-package-manager.js

@@ -19,10 +19,8 @@ const {
   setProjectPackageManager,
   getAvailablePackageManagers,
   detectFromLockFile,
-  detectFromPackageJson,
-  getSelectionPrompt
+  detectFromPackageJson
 } = require('./lib/package-manager');
-const { log } = require('./lib/utils');
 
 function showHelp() {
   console.log(`