BridgeJS: Import-side Array Support

[krodak]

Overview

Hey @kateinoigakukun, this is a PR where I tried implementing import-side array support for BridgeJS. I noticed your PR #572 covers the same area, so I integrated some of the fixes from there (like stackLoweringStmts, Array: _BridgedSwiftStackType conformance, the let _ = pattern, and the liftReturn fix for 0-param fragments).

Hopefully some parts of this can help you finalise your PR. Feel free to close if not needed.

Additional bits not in #572

• processor.js: TypeScript array type detection using checker.isArrayType() so number[] generates [Double] instead of JSObject
• E2E import tests: Added bridge-js.d.ts declarations, Swift test cases, and JS implementations for:
  • jsRoundTripNumberArray / jsRoundTripStringArray / jsRoundTripBoolArray
  • jsSumNumberArray / jsCreateNumberArray

[kateinoigakukun]

Thanks! My today's plans are to finalize #570 first, then resume #572. But feel free to take it over the Array support if you have bandwidth. Either way, your PR seems valuable, thanks!

[krodak]

@kateinoigakukun I'd try it out as was interested to have a look on import side, just got postponed with yesterday's work.
Can integrate and finalise after your #570

[krodak]

@kateinoigakukun I think this is actually ready for review now, if I'm not mistaken, it could be treated as finalized #572

[kateinoigakukun]

Oh, I thought it's still WIP just because of the PR description 😅

[krodak]

I needed to double check everything against #572, as I wasn't that confident on import-side implementation, but should be good and rebased now 🙏🏻

[kateinoigakukun]

Let's go ahead