Reestructure repo and CI improvements

[jedel1043]

Our number of crates is slowly growing, and it's getting harder to find the exact crate that you want to open when working on the repo. This PR proposes:

• Removing the boa_ prefix on all directories, since that's mostly superfluous.
• Separating our crates in groups:
  • core for the essential crates.
  • tests for test crates.
  • ffi for FFI related crates (only wasm for now).
  • examples, which is just a plain crate in the root for accessibility.
  • cli which is just a plain crate for simplicity.

This also adds some small CI improvements, like better VSCode launch and task scripts, and some cache actions that weren't caching cargo installs.

[nekevss]

I actually like this change a lot! One early question: is there a reason for core over crates. I think bevy, wasmtime, rust-analyzer, and cargo all use a crates directory, and I had assumed, perhaps wrongly, that that was the semi "standard" after a certain point on a project.

[jedel1043]

I actually like this change a lot! One early question: is there a reason for core over crates. I think bevy, wasmtime, rust-analyzer, and cargo all use a crates directory, and I had assumed, perhaps wrongly, that that was the semi "standard" after a certain point on a project.

It's just personal preference, and crates is not really standard per se. ICU4X uses a similar structure as the proposed one, with a components folder with the public APIs and some secondary directories such as utils, ffi, tools, etc.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,609	95,960	+351
Passed	76,526	76,534	+8
Ignored	18,132	18,477	+345
Failed	951	949	-2
Panics	0	0	0
Conformance	80.04%	79.76%	-0.28%

Fixed tests (4):

test/intl402/Locale/likely-subtags.js [strict mode] (previously Failed)
test/intl402/Locale/likely-subtags.js (previously Failed)
test/intl402/Locale/prototype/minimize/removing-likely-subtags-first-adds-likely-subtags.js [strict mode] (previously Failed)
test/intl402/Locale/prototype/minimize/removing-likely-subtags-first-adds-likely-subtags.js (previously Failed)

Broken tests (2):

test/built-ins/RegExp/unicode_full_case_folding.js [strict mode] (previously Passed)
test/built-ins/RegExp/unicode_full_case_folding.js (previously Passed)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (main@6f5c25c). Click here to learn what that means.

Additional details and impacted files

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  Coverage        ?   49.01%           
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  Files           ?      469           
  Lines           ?    48186           
  Branches        ?        0           
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  Hits            ?    23618           
  Misses          ?    24568           
  Partials        ?        0           

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[HalidOdat]

Nice change! :)

[nekevss]

Looks good to me!

[nekevss]

Nice catch on this!