feat!: use immutable route data

**BREAKING CHANGES**

`StrictRouteData`
members are now read-only.

TypeScript will fail to compile application code that mutates route data data structures.

BEFORE:

```typescript
// heroes.component.ts
// (...)
import { RouterStore } from "@ngworker/router-component-store";

@component({
  // (...)
})
export class DashboardComponent {
  #routerStore = inject(RouterStore);

  limit$: Observable<number> = this.#routerStore. routeData$.pipe(
    map((data) => {
      data["limit"] = Number(data["limit"])

      return data;
    }),
    map(data => data["limit"])
  );
}
```

AFTER:

```typescript
// heroes.component.ts
// (...)
import { RouterStore } from "@ngworker/router-component-store";

@component({
  // (...)
})
export class DashboardComponent {
  #routerStore = inject(RouterStore);

  limit$: Observable<number> = this.#routerStore.routeData$.pipe(
    map((data) => Number(data["limit"]))
  );
}
```

Author: LayZeeDK

README.md

@@ -187,7 +187,7 @@ The `StrictRouteData` interface is used for the `MinimalActivatedRouteSnapshot#d
 
 ```typescript
 export type StrictRouteData = {
-  [key: string]: unknown;
+  readonly [key: string]: unknown;
 };
 ```
 

packages/router-component-store/src/lib/strict-route-data.ts

@@ -9,4 +9,4 @@ import { StrictNoAny } from './util-types/strict-no-any';
  *
  * Additionally, the `any` member type is converted to `unknown`.
  */
-export type StrictRouteData = StrictNoAny<OmitSymbolIndex<Data>>;
+export type StrictRouteData = Readonly<StrictNoAny<OmitSymbolIndex<Data>>>;