chore: tweak docs and examples to match recommended practices 2024 (use screen object for queries)

[vanGalilea]

Summary

Changes to lib.'s docs and example code to align with @mdjastrzebski's blog "Recommended practices for React Native Testing Library in 2024"

This part touches the following

• use screen object for queries, over deconstructing return value from render function

Test plan

• Ensure CI/CD checks
• Verify readability and whether the examples and docs make sense and align with new best practices

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.50%. Comparing base (a282d1e) to head (1c64b86). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1561 +/- ## ========================================== - Coverage 95.51% 95.50% -0.02% ========================================== Files 99 99 Lines 5400 5400 Branches 857 857 ========================================== - Hits 5158 5157 -1 - Misses 242 243 +1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[vanGalilea]

@mdjastrzebski hi hi 👋🏻 this one is ready for review

[vanGalilea]

codecov we have a (-0.02%) code coverage decrease, though I haven't removed/changes any test cases 🤷🏻‍♂️ 😓

[vanGalilea]

@mdjastrzebski can you please have a look at this PR?

[mdjastrzebski]

@vanGalilea thanks for your patience. I'll try to look this or next week.

[mdjastrzebski]

@vanGalilea Thanks for submitting this PR!