chore: clean up .gitignore, remove unused entries (#61)

.gitignore

@@ -4,42 +4,14 @@ data/
 .env
 .env.*
 *.log
-internal config
 
 # Backup files
 *.bak
 
-docs-site/
-docs/
-*.txt
-
-examples/
-
 # Generated by CI
 *.cdx.json
 
-# Dead crates (kept in repo for reference but excluded from workspace)
-# nora-cli/ and nora-storage/ remain in git but are not built
-
 # Playwright / Node
 node_modules/
-package.json
 package-lock.json
 /tmp/
-
-# AI tooling — NEVER commit
-CLAUDE.md
-QWEN.md
-MOTHER-CLAUDE*.md
-.claude/
-.qwen/
-.cursor/
-.aider*
-.copilot/
-
-# Internal process
-SESSION*.md
-TODO.md
-RELEASE_RUNBOOK.md
-.internal/
-scripts/qa-panel.sh