test(RouterHooks): implement router state testing in init hook

[il-sairamg]

Description:

• Added router state testing implementation in component's init hook

• Set up state handling for path, params, and query parameters

• Configured URL hash-based query parameter parsing

• Added state information display via JSON.stringify

• Testing covers:

  • Router state data extraction and display
  • State object structure validation
  • Query parameters from router state
  • Path and params from router state

[michielvandergeest]

Thanks for this PR! A few comments:

• I'm getting some linting errors, please don't forget to lint:fix before comitting
• I get a warning about modifying the page prop, we shouldn't be overwriting props
• I'm not sure about the part about queryParams. I don't think query or queryParams even exists on the route state object - why is this part there?

➡️ let's keep the example as simple and clear as possible and test only whether the correct information is available in the router state object in the init hook (in line with the recent change)