Add Swift bindings source

[danieldaquino]

Summary

This PR addresses the issue at #51, by adding the missing generated Swift bindings source file.

This file was generated using the instructions outlined here: https://github.com/lightningdevkit/orange-sdk/blob/master/SWIFT.md#generating-swift-bindings

(If it makes it easier to review, the reviewer can generate that file locally and diff against this PR)

Issue repro

Swift:

% swift --version
swift-driver version: 1.127.15 Apple Swift version 6.2.4 (swiftlang-6.2.4.1.4 clang-1700.6.4.2)
Target: arm64-apple-macosx26.0

OS: macOS 26
Orange SDK: 34367b6
Setup: Using a local clone of the repo for testing purposes
Steps:

1. Create a new empty Swift package:

mkdir orange-sdk-client-test
cd orange-sdk-client-test
git init
swift package init
git add --all
git commit -m "Initial commit"

2. Add the local Orange SDK clone as a dependency. Here is the Package.swift:

// swift-tools-version: 6.2
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "orange-sdk-client-test",
    products: [
        // Products define the executables and libraries a package produces, making them visible to other packages.
        .library(
            name: "orange-sdk-client-test",
            targets: ["orange-sdk-client-test"]
        ),
    ],
    dependencies: [
        .package(path: "../orange-sdk")
    ],
    targets: [
        // Targets are the basic building blocks of a package, defining a module or a test suite.
        // Targets can depend on other targets in this package and products from dependencies.
        .target(
            name: "orange-sdk-client-test"
        ),
        .testTarget(
            name: "orange-sdk-client-testTests",
            dependencies: ["orange-sdk-client-test"]
        ),
    ]
)

4. Build

Results

Fails with the same error as reported in the original ticket:

% swift build
error: 'orange-sdk': invalid custom path 'bindings/swift/Sources/OrangeSDK' for target 'OrangeSDK'

Testing

Swift:

% swift --version
swift-driver version: 1.127.15 Apple Swift version 6.2.4 (swiftlang-6.2.4.1.4 clang-1700.6.4.2)
Target: arm64-apple-macosx26.0

OS: macOS 26
Orange SDK: 078333e

Steps: Same as listed in the Issue reproduction section above

Results

Reported error no longer appears:

% swift build
warning: 'orange-sdk-client-test': dependency 'orange-sdk' is not used by any target
[1/1] Planning build
Building for debugging...
[1/1] Write swift-version--58304C5D6DBC2206.txt
Build complete! (0.20s)

[benthecarman]

thanks! sorry about this, was never sure which files are build artifacts and which are needed for bindings