BREAKING CHANGE(SmartAcme): Refactor challenge handling by removing legacy setChallenge/removeChallenge in favor of pluggable challengeHandlers and update documentation and tests accordingly

ts/handlers/IChallengeHandler.ts

@@ -0,0 +1,22 @@
+/**
+ * Pluggable interface for ACME challenge handlers.
+ * Supports DNS-01, HTTP-01, TLS-ALPN-01, or custom challenge types.
+ */
+export interface IChallengeHandler<T> {
+  /**
+   * ACME challenge types this handler supports (e.g. ['dns-01']).
+   */
+  getSupportedTypes(): string[];
+  /**
+   * Prepare the challenge: set DNS record, start HTTP/TLS server, etc.
+   */
+  prepare(ch: T): Promise<void>;
+  /**
+   * Optional extra verify step (HTTP GET, ALPN handshake).
+   */
+  verify?(ch: T): Promise<void>;
+  /**
+   * Clean up resources: remove DNS record, stop server.
+   */
+  cleanup(ch: T): Promise<void>;
+}