Initial Meridian Protocol implementation

- Complete MeridianToken standard with compliance & reserve checks
- Multi-custodian ReserveAggregator supporting bank/crypto/fund admin
- Comprehensive Compliance engine with KYC/AML/sanctions
- Full interface definitions and deployment scripts
- Test suite for core functionality
- Ready for GBP launch with Anchorage custody integration

.gitignore

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+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Environment variables
+.env
+
+# Hardhat files
+cache/
+artifacts/
+typechain/
+typechain-types/
+
+# Coverage reports
+coverage/
+coverage.json
+
+# Deployment artifacts
+deployment-*.json
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Build outputs
+dist/
+build/