feat: WebIDL derive macro

[crowlKats]

• adds a WebIdlConverter trait
  • implemented for Vec, to have sequence converters
  • implemented for Option, to have nullable converters
  • implemented for HashMap, to have record converters
  • implemented for integers
  • implemented for floats, and creates Unrestricted structs for unrestricted float and unrestricted double
  • implemented for booleans
  • implemented for string
  • creates new ByteString struct for bytestring conversion
  • creates new BigInt struct for bigint conversion
• adds a WebIDL derive macro, current only allowed on structs as a dictionary converter and on enums as enum converters

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.61578% with 176 lines in your changes missing coverage. Please review.

Project coverage is 81.76%. Comparing base (0c7f83e) to head (21b1cd0).
Report is 210 commits behind head on main.

Files with missing lines	Patch %	Lines
core/webidl.rs	87.38%	125 Missing ⚠️
ops/webidl/dictionary.rs	93.17%	17 Missing ⚠️
ops/op2/dispatch_slow.rs	76.47%	12 Missing ⚠️
ops/webidl/mod.rs	91.97%	11 Missing ⚠️
ops/webidl/enum.rs	90.32%	6 Missing ⚠️
ops/op2/signature.rs	90.47%	4 Missing ⚠️
ops/lib.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1003      +/-   ##
==========================================
+ Coverage   81.43%   81.76%   +0.32%     
==========================================
  Files          97      103       +6     
  Lines       23877    27657    +3780     
==========================================
+ Hits        19445    22613    +3168     
- Misses       4432     5044     +612     

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[littledivy]

LGTM! Let's try it out in Deno and iterate based on what's needed.

cc @ry @bartlomieju

[bartlomieju]

LGTM too, let's try it out.