Add fast path for number to JsString conversion

[CrazyboyQCD]

This removes the intermediate String to JsString conversion.

[codecov]

Codecov Report

Attention: Patch coverage is 78.26087% with 5 lines in your changes missing coverage. Please review.

Project coverage is 52.95%. Comparing base (6ddc2b4) to head (0cf5f2f).
Report is 305 commits behind head on main.

Files with missing lines	Patch %	Lines
core/engine/src/property/mod.rs	60.00%	4 Missing ⚠️
core/engine/src/builtins/typed_array/object.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4054      +/-   ##
==========================================
+ Coverage   47.24%   52.95%   +5.71%     
==========================================
  Files         476      484       +8     
  Lines       46892    47201     +309     
==========================================
+ Hits        22154    24997    +2843     
+ Misses      24738    22204    -2534     

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[jasonwilliams]

Main:

PROGRESS Richards
RESULT Richards 120
PROGRESS DeltaBlue
RESULT DeltaBlue 109
PROGRESS Encrypt
PROGRESS Decrypt
RESULT Crypto 169
PROGRESS RayTrace
RESULT RayTrace 340
PROGRESS Earley
PROGRESS Boyer
RESULT EarleyBoyer 371
PROGRESS RegExp
RESULT RegExp 86.7
PROGRESS Splay
RESULT Splay 336
PROGRESS NavierStokes
RESULT NavierStokes 369
SCORE 204

This branch:

PROGRESS Richards
RESULT Richards 120
PROGRESS DeltaBlue
RESULT DeltaBlue 108
PROGRESS Encrypt
PROGRESS Decrypt
RESULT Crypto 175
PROGRESS RayTrace
RESULT RayTrace 340
PROGRESS Earley
PROGRESS Boyer
RESULT EarleyBoyer 377
PROGRESS RegExp
RESULT RegExp 87.5
PROGRESS Splay
RESULT Splay 344
PROGRESS NavierStokes
RESULT NavierStokes 390
SCORE 207

[raskad]

The change looks good! @CrazyboyQCD can you rebase this on main?