docs: Ledger Live integration, contract deploy learnings, NEXT_STEPS updates

- ADD_CHAIN138_TO_LEDGER_LIVE: Ledger form done; public code review repo bis-innovations/LedgerLive; init/push commands
- CONTRACT_DEPLOYMENT_RUNBOOK: Chain 138 gas price 1 gwei, 36-addr check, TransactionMirror workaround
- CONTRACT_*: AddressMapper, MirrorManager deployed 2026-02-12; 36-address on-chain check
- NEXT_STEPS_FOR_YOU: Ledger done; steps completable now (no LAN); run-completable-tasks-from-anywhere
- MASTER_INDEX, OPERATOR_OPTIONAL, SMART_CONTRACTS_INVENTORY_SIMPLE: updates
- LEDGER_BLOCKCHAIN_INTEGRATION_COMPLETE: bis-innovations/LedgerLive reference

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/dev-vm/gitignore-default.txt

@@ -0,0 +1,49 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+vendor/
+
+# Package manager lock files (optional: uncomment to ignore)
+# package-lock.json
+# yarn.lock
+
+# Environment and secrets
+.env
+.env.local
+.env.*.local
+*.env.backup
+.env.backup.*
+
+# Logs and temp
+*.log
+logs/
+*.tmp
+*.temp
+*.tmp.*
+
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Build / output
+dist/
+build/
+.next/
+out/
+*.pyc
+__pycache__/
+.eggs/
+*.egg-info/
+.coverage
+htmlcov/
+
+# Optional
+.reports/
+reports/