Annotation usage tests and error msg improvements

[wldeh]

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Introduces annotation tests and improves error messages to ensure the library behaves as expected across different use cases.

• [x] Verify failure & error message when using @Param on val properties.
• [x] Verify success/failure & error clarity when using @Param on:
  • [x] final properties.
  • [x] private properties.
  • [x] internal properties.
• [x] Verify success/failure & error clarity when using @Benchmark on:
  • [x] final methods.
  • [x] private methods.
  • [x] internal methods.
• [x] Test behavior when a setup, teardown, or benchmark method takes:
  • [x] A Blackhole.
  • [ ] A @State object.
  • [x] An argument that is neither a Blackhole nor a @State object.
• [x] Test for successful/error behavior when:
  • [x] A method is marked with both @Benchmark and @Setup/@TearDown.
  • [x] A method is marked with both @Setup and @TearDown.