Track .claude/ settings and .superpowers/ so they sync across clones

.claude/settings.local.json is forced past the global ~/.config/git/ignore
rule (**/.claude/settings.local.json); .superpowers/ is no longer gitignored.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -15,7 +15,6 @@ __pycache__/
 
 # Local-only diagnostic logs from test runs
 _test_*.log
-.superpowers/
 
 # --- Split-out module repos (now independent git repos; managed separately) ---
 /disable_iap_calls/