Convert into Swift Package (#1)

* Update README.md

* Add Swift Package Manager entries to .gitignore

* Remove Xcode project, Earcut header, and Info.plist files not needed for Swift Package

* Add Package.swift, move folders Earcut / EarcutTests into Swift Package's Source / Tests folders

* Add suggested LICENSE files (ISC for Mapbox & MIT)

* Update Bundle url to access Mapbox test files in fixtures folder

* Fix typo

* Make classes Node and NodeAllocator fileprivate

* Update copyright of Earcut.swift with reference to LICENSE files in repo

* Add code documentation

* Apply Airbnb Swift Style Guide

* Update Package.swift

* Add GitHub Workflow for testing

* Update README including links to Swift Package Index, add spi.yml for the latter's hosted DocC documentation

* Move Swift build and test workflow to .github/workflows/swift.yml

* Rename Earcut to SwiftEarcut

.github/workflows/swift.yml

@@ -0,0 +1,21 @@
+# This workflow will build a Swift project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-swift
+
+name: Swift Build and Test
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: swift build -v
+    - name: Run tests
+      run: swift test -v

.gitignore

@@ -37,10 +37,11 @@ playground.xcworkspace
 # Swift Package Manager
 #
 # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
-# Packages/
-# Package.pins
-# Package.resolved
+Packages/
+Package.pins
+Package.resolved
 .build/
+.swiftpm/
 
 # CocoaPods
 #

.spi.yml

@@ -0,0 +1,4 @@
+version: 1
+builder:
+  configs:
+    - documentation_targets: [SwiftEarcut]