[Merged by Bors] - API to construct a NativeFunction from a native async function

[jedel1043]

Builds off of #2529. Merged.

This Pull Request allows passing any function returning impl Future<Output = JsResult<JsValue>> to the NativeFunction constructor, allowing native concurrency hooks into the engine.

It changes the following:

• Adds a NativeFunction::from_async_fn function.
• Adds a new JobQueue::enqueue_future_job method.
• Adds an example usage on boa_examples.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,141	94,141	0
Passed	71,914	71,914	0
Ignored	17,218	17,218	0
Failed	5,009	5,009	0
Panics	12	12	0
Conformance	76.39%	76.39%	0.00%

[codecov]

Codecov Report

Merging #2542 (a6aa857) into main (591befe) will increase coverage by 0.16%.
The diff coverage is 6.84%.

@@            Coverage Diff             @@
##             main    #2542      +/-   ##
==========================================
+ Coverage   49.55%   49.71%   +0.16%     
==========================================
  Files         386      384       -2     
  Lines       39133    38996     -137     
==========================================
- Hits        19391    19386       -5     
+ Misses      19742    19610     -132     

Impacted Files	Coverage Δ
boa_cli/src/main.rs	0.90% <0.00%> (-0.03%)	⬇️
boa_engine/src/job.rs	53.48% <0.00%> (-5.49%)	⬇️
boa_engine/src/native_function.rs	45.09% <0.00%> (-31.57%)	⬇️
boa_examples/src/bin/futures.rs	0.00% <0.00%> (ø)
boa_interner/src/lib.rs	84.03% <ø> (ø)
boa_engine/src/builtins/promise/mod.rs	22.52% <100.00%> (-0.39%)	⬇️
boa_engine/src/value/display.rs	86.56% <0.00%> (-0.75%)	⬇️
boa_engine/src/object/mod.rs	29.13% <0.00%> (-0.11%)	⬇️
boa_examples/src/bin/jstypedarray.rs
boa_examples/src/bin/jsarraybuffer.rs
... and 4 more

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[HalidOdat]

This looks perfect to me! Great work @jedel1043

[nekevss]

This looks good to me 😄

[jedel1043]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Build and Test (macos-latest)
• Build and Test (windows-latest)
• Coverage
• Misc