bindings: Apple compliant framework distribution

[lvaccaro]

• creating swift bindings
• creating a wrapper project with xcodegen, instead maintain a full .xcproject
• archiving both platforms
• assembling the final xcframework

[LeoComandini]

just-swift gh ci job failed with

      Running `target/debug/lwk_cli generate --library ./target/aarch64-apple-ios/release/liblwk.a --language swift --out-dir ./target/swift`
null
xcodegen generate --spec lwk_bindings/swift/project.yml
sh: xcodegen: command not found
error: Recipe `swift` failed on line 128 with exit code 12

[LeoComandini]

with swift ci fixed lgtm

[LeoComandini]

is

        - run: brew install xcodegen
        - run: just swift

enough?
@lvaccaro

[lvaccaro]

right, it only needs xcodegen as in the Blockstream/lwk-swift#12

[LeoComandini]

just swift still fails

https://github.com/Blockstream/lwk/actions/runs/24246432072/job/71098669740

Run nightstory/setup-xcodegen@v1
  
/Users/runner/work/_actions/nightstory/setup-xcodegen/v1/node_modules/@actions/cache/lib/internal/cacheHttpClient.js:81
            throw new Error(`Cache service responded with ${response.statusCode}`);
                  ^
Error: Cache service responded with 400
    at Object.<anonymous> (/Users/runner/work/_actions/nightstory/setup-xcodegen/v1/node_modules/@actions/cache/lib/internal/cacheHttpClient.js:81:19)
    at Generator.next (<anonymous>)
    at fulfilled (/Users/runner/work/_actions/nightstory/setup-xcodegen/v1/node_modules/@actions/cache/lib/internal/cacheHttpClient.js:5:58)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
Node.js v20.20.1

[LeoComandini]

@lvaccaro can you please address the just swift CI failure?

[lvaccaro]

just swift pass in 43bbb6b .

Note: I bump github ci to use macos-15 because xcodegen doesn't support legacy xcode version.

[RCasatta]

utACK 43bbb6b code review, checked just swift passed