feat(security): implement IP reputation checker and security logger

- Added IPReputationChecker class for checking and caching IP reputation scores.
- Introduced IReputationResult interface and ReputationThreshold enum for reputation scoring.
- Implemented DNSBL checks and IP information retrieval within the IP reputation checker.
- Created SecurityLogger class for logging security events with various log levels and event types.
- Defined ISecurityEvent interface for structured logging of security events.
- Updated index.ts to export new classes and types for security module.

ts/security/index.ts

@@ -0,0 +1,21 @@
+export {
+  SecurityLogger,
+  SecurityLogLevel,
+  SecurityEventType,
+  type ISecurityEvent
+} from './classes.securitylogger.ts';
+
+export {
+  IPReputationChecker,
+  ReputationThreshold,
+  IPType,
+  type IReputationResult,
+  type IIPReputationOptions
+} from './classes.ipreputationchecker.ts';
+
+export {
+  ContentScanner,
+  ThreatCategory,
+  type IScanResult,
+  type IContentScannerOptions
+} from './classes.contentscanner.ts';