fix: implement TryIntoJs and TryFromJs for common Rust wrapper types

[jakharmonika364]

Closes #4360

This PR implements TryIntoJs and TryFromJs for common Rust wrapper types and refactors class conversions to resolve trait conflicts.

Key Changes:

• Wrapper Support: Added TryIntoJs and TryFromJs support for Box, Rc, Arc, and &T.
• Architectural Refactor: Removed the blanket TryIntoJs implementation for Class + Clone and moved it into the boa_class macro. This resolves a trait conflict that was previously blocking the new wrapper implementations.
• Testing: Added a unit test manual_repro_4360 in try_into_js.rs to verify derived objects handle standard string coercion correctly.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,862	52,862	0
Passed	49,504	49,504	0
Ignored	2,262	2,262	0
Failed	1,096	1,096	0
Panics	0	0	0
Conformance	93.65%	93.65%	0.00%

[hansl]

Just want to clarify, this PR does not change the TryIntoJs macro, what am I missing?

[jakharmonika364]

I noticed after pushing that the prototype fix in the macro was already there in main. The main point of this PR now is implementing TryIntoJs and TryFromJs from wrapper types. I had to refactor how native classes handle conversion to resolve a trait conflict that was previously blocking those wrapper implementations. I'll update the PR description to reflect the actual changes.