BREAKING CHANGE(docs): Update documentation and examples to unify async and sync assertions, add custom matcher guides, and update package configuration

ts/namespaces/index.ts

@@ -0,0 +1,8 @@
+export { StringMatchers } from './string.js';
+export { ArrayMatchers } from './array.js';
+export { NumberMatchers } from './number.js';
+export { BooleanMatchers } from './boolean.js';
+export { ObjectMatchers } from './object.js';
+export { FunctionMatchers } from './function.js';
+export { DateMatchers } from './date.js';
+export { TypeMatchers } from './type.js';