feat(detection): add centralized protocol detection module

- Created ts/detection module for unified protocol detection
- Implemented TLS and HTTP detectors with fragmentation support
- Moved TLS detection logic from existing code to centralized module
- Updated RouteConnectionHandler to use ProtocolDetector for both TLS and HTTP
- Refactored ACME HTTP parsing to use detection module
- Added comprehensive tests for detection functionality
- Eliminated duplicate protocol detection code across codebase

This centralizes all non-destructive protocol detection into a single module,
improving code organization and reducing duplication between ACME and routing.

ts/detection/models/interfaces.ts

@@ -0,0 +1,115 @@
+/**
+ * Interface definitions for protocol detection components
+ */
+
+import type { IDetectionResult, IDetectionOptions } from './detection-types.js';
+
+/**
+ * Interface for protocol detectors
+ */
+export interface IProtocolDetector {
+  /**
+   * Detect protocol from buffer data
+   * @param buffer The buffer to analyze
+   * @param options Detection options
+   * @returns Detection result or null if protocol cannot be determined
+   */
+  detect(buffer: Buffer, options?: IDetectionOptions): IDetectionResult | null;
+  
+  /**
+   * Check if buffer potentially contains this protocol
+   * @param buffer The buffer to check
+   * @returns True if buffer might contain this protocol
+   */
+  canHandle(buffer: Buffer): boolean;
+  
+  /**
+   * Get the minimum bytes needed for detection
+   */
+  getMinimumBytes(): number;
+}
+
+/**
+ * Interface for connection tracking during fragmented detection
+ */
+export interface IConnectionTracker {
+  /**
+   * Connection identifier
+   */
+  id: string;
+  
+  /**
+   * Accumulated buffer data
+   */
+  buffer: Buffer;
+  
+  /**
+   * Timestamp of first data
+   */
+  startTime: number;
+  
+  /**
+   * Current detection state
+   */
+  state: 'detecting' | 'complete' | 'failed';
+  
+  /**
+   * Partial detection result (if any)
+   */
+  partialResult?: Partial<IDetectionResult>;
+}
+
+/**
+ * Interface for buffer accumulator (handles fragmented data)
+ */
+export interface IBufferAccumulator {
+  /**
+   * Add data to accumulator
+   */
+  append(data: Buffer): void;
+  
+  /**
+   * Get accumulated buffer
+   */
+  getBuffer(): Buffer;
+  
+  /**
+   * Get buffer length
+   */
+  length(): number;
+  
+  /**
+   * Clear accumulated data
+   */
+  clear(): void;
+  
+  /**
+   * Check if accumulator has enough data
+   */
+  hasMinimumBytes(minBytes: number): boolean;
+}
+
+/**
+ * Detection events
+ */
+export interface IDetectionEvents {
+  /**
+   * Emitted when protocol is successfully detected
+   */
+  detected: (result: IDetectionResult) => void;
+  
+  /**
+   * Emitted when detection fails
+   */
+  failed: (error: Error) => void;
+  
+  /**
+   * Emitted when detection times out
+   */
+  timeout: () => void;
+  
+  /**
+   * Emitted when more data is needed
+   */
+  needMoreData: (bytesNeeded: number) => void;
+}