fix(smartacme): Refactor module exports and update wildcard certificate support documentation

ts/index.ts

@@ -1,4 +1,5 @@
 export * from './smartacme.classes.smartacme.js';
 export { SmartacmeCert as Cert } from './smartacme.classes.cert.js';
 export type { ICertManager } from './interfaces/certmanager.js';
-export { MemoryCertManager, MongoCertManager } from './certmanagers/index.js';
+import * as certmanagers from './certmanagers/index.js';
+export { certmanagers };