Add example for async module fetches

[jedel1043]

This should probably be adapted to offer a similar feature in our playground, but with more resilience against connection errors.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	50,268	50,268	0
Passed	42,549	42,549	0
Ignored	1,570	1,570	0
Failed	6,149	6,149	0
Panics	0	0	0
Conformance	84.64%	84.64%	0.00%

[codecov]

Codecov Report

Attention: 115 lines in your changes are missing coverage. Please review.

Comparison is base (6ddc2b4) 47.24% compared to head (b5d8f2b) 50.46%.
Report is 33 commits behind head on main.

❗ Current head b5d8f2b differs from pull request most recent head df87c31. Consider uploading reports for the commit df87c31 to get more accurate results

Files	Patch %	Lines
boa_examples/src/bin/module_fetch.rs	0.00%	115 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3012      +/-   ##
==========================================
+ Coverage   47.24%   50.46%   +3.21%     
==========================================
  Files         476      447      -29     
  Lines       46892    46035     -857     
==========================================
+ Hits        22154    23230    +1076     
+ Misses      24738    22805    -1933     

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[HalidOdat]

Looks good!

[HalidOdat]

The rest looks great! :)

[jedel1043]

I will rebase this ASAP to merge this.

[raskad]

Really useful example.