Added ci workflows

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  mac:
+    name: macOS
+    runs-on: macos-12
+    strategy:
+      matrix:
+        xcode: ['13.3', '14.2']
+        config: ['debug', 'release']
+    steps:
+    - uses: actions/checkout@v3
+    - name: Select Xcode ${{ matrix.xcode }}
+      run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
+    - name: Swift Version
+      run: swift --version
+    - name: Run ${{ matrix.xcode }} Tests
+      run: make CONFIG=${{ matrix.config }} test-library
+
+  ubuntu:
+    name: Ubuntu
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: swift-actions/setup-swift@v1
+      with:
+        swift-version: 5.7
+    - uses: actions/checkout@v3
+    - name: Run Tests
+      run: make DOCKER_PLATFORM=linux/amd64 test-linux

.github/workflows/documentation.yml

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+# Build and deploy DocC to GitHub pages. Based off of @karwa's work here:
+# https://github.com/karwa/swift-urlblob/main/.github/workflows/docs.yml
+name: Documentation
+
+on:
+  release:
+    types:
+      - published
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency:
+  group: docs-${{ github.ref }}
+  cancel-in-progress: true
+
+# Sets permissions to allow deployment to Github Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: macos-12
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Build DocC
+        run: make build-documentation
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: 'docs'
+      - name: Deploy to Github Pages
+        id: deployment
+        uses: actions/deploy-pages@v1