feat(generics): Improve assertion and matcher type definitions by adding execution mode generics for better async/sync support

ts/namespaces/function.ts

@@ -1,10 +1,11 @@
 import { Assertion } from '../smartexpect.classes.assertion.js';
+import type { TExecutionType } from '../types.js';
 
 /**
  * Namespace for function-specific matchers
  */
-export class FunctionMatchers {
-  constructor(private assertion: Assertion<Function>) {}
+export class FunctionMatchers<M extends TExecutionType> {
+  constructor(private assertion: Assertion<Function, M>) {}
 
   toThrow(expectedError?: any) {
     return this.assertion.customAssertion(