Remove emojis from all markdown docs, add consolidation plan

- Strip emojis from 47 markdown files across docs/, sql/, and root
- Add docs/DOCS_CONSOLIDATION_PLAN.md with plan to reduce 45 docs to 8
- Establish no-emoji rule for documentation going forward

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sql/migration_phase4/README.md

@@ -91,7 +91,7 @@ mysql -u root -p shopdb < VERIFY_PHASE4_MIGRATION.sql
 mysql -u root -p shopdb < VERIFY_PHASE4_MIGRATION.sql
 ```
 
-All checks should show `✓ PASS`.
+All checks should show ` PASS`.
 
 ## Rollback Instructions