Add publish workflows for npmjs and CocoaPods

This adds workflows which run on tag, or manually, to publish packages to npmjs and cocoapods. These secrets should be set, but this is untested. We can fix manually and re-run though.

.github/workflows/publish-cocoapods-release.yml

@@ -0,0 +1,28 @@
+name: Publish CocoaPods Release
+
+on:
+  push:
+    tags:
+      - *
+  workflow_dispatch:
+
+jobs:
+  publish:
+    name: Publish to CocoaPods trunk
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup
+        uses: ./.github/actions/setup-apple
+
+      - name: Publish Yoga
+        run: pod trunk push Yoga.podspec
+        env:
+          COCOAPODS_TRUNK_TOKEN: ${{ secrets.COCOAPODS_TRUNK_TOKEN }}
+
+      - name: Publish YogaKit
+        run: pod trunk push YogaKit.podspec
+        env:
+          COCOAPODS_TRUNK_TOKEN: ${{ secrets.COCOAPODS_TRUNK_TOKEN }}