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/paths.ts

@@ -0,0 +1,48 @@
+import * as plugins from './plugins.js';
+
+// Base directories
+export const baseDir = process.cwd();
+export const packageDir = plugins.path.join(
+  plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+  '../'
+);
+export const distServe = plugins.path.join(packageDir, './dist_serve');
+
+// Configure data directory with environment variable or default to .nogit/data
+const DEFAULT_DATA_PATH = '.nogit/data';
+export const dataDir = process.env.DATA_DIR 
+  ? process.env.DATA_DIR 
+  : plugins.path.join(baseDir, DEFAULT_DATA_PATH);
+
+// MTA directories 
+export const keysDir = plugins.path.join(dataDir, 'keys');
+export const dnsRecordsDir = plugins.path.join(dataDir, 'dns');
+export const sentEmailsDir = plugins.path.join(dataDir, 'emails', 'sent');
+export const receivedEmailsDir = plugins.path.join(dataDir, 'emails', 'received');
+export const failedEmailsDir = plugins.path.join(dataDir, 'emails', 'failed'); // For failed emails
+export const logsDir = plugins.path.join(dataDir, 'logs'); // For logs
+
+// Email template directories
+export const emailTemplatesDir = plugins.path.join(dataDir, 'templates', 'email');
+export const MtaAttachmentsDir = plugins.path.join(dataDir, 'attachments'); // For email attachments
+
+// Configuration path
+export const configPath = process.env.CONFIG_PATH 
+  ? process.env.CONFIG_PATH 
+  : plugins.path.join(baseDir, 'config.json');
+
+// Create directories if they don't exist
+export function ensureDirectories() {
+  // Ensure data directories
+  plugins.smartfile.fs.ensureDirSync(dataDir);
+  plugins.smartfile.fs.ensureDirSync(keysDir);
+  plugins.smartfile.fs.ensureDirSync(dnsRecordsDir);
+  plugins.smartfile.fs.ensureDirSync(sentEmailsDir);
+  plugins.smartfile.fs.ensureDirSync(receivedEmailsDir);
+  plugins.smartfile.fs.ensureDirSync(failedEmailsDir);
+  plugins.smartfile.fs.ensureDirSync(logsDir);
+  
+  // Ensure email template directories
+  plugins.smartfile.fs.ensureDirSync(emailTemplatesDir);
+  plugins.smartfile.fs.ensureDirSync(MtaAttachmentsDir);
+}