fix(wasm_hover): remove json serialization

[goulvenclech]

For get_hover in WASM : Embedding JSON data at compile time, modifying the function signature, and updating the benchmark to reflect these changes.

How is it tested?

Through benchmarks.

How is it documented?

A comment was added to the code, and I'll create an issue.

[codspeed-hq]

CodSpeed Performance Report

Merging #6 will degrade performances by 37.41%

_{Comparing fix_wasm_hover_json_serial (a9b88c6) with main (5501f68)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 6 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	fix_wasm_hover_json_serial	Change
❌	CSSLSRS(WASM) - Document colors	39 ms	62.4 ms	-37.41%
⚡	CSSLSRS(WASM) - Hover	45,593.5 µs	409.2 µs	×110