Add release workflows

.github/workflows/publish_flutter_packages.yaml

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+name: Publish Package
+
+on:
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        description: 'Validate but do not push the package'
+        type: boolean
+        required: true
+  workflow_call:
+    inputs:
+      dry-run:
+        description: 'Validate but do not push the package'
+        type: boolean
+        required: true
+
+jobs:
+  publish:
+    name: Publish Package
+
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    strategy:
+      matrix:
+        package: ['embrace_platform_interface', 'embrace_ios', 'embrace_android', 'embrace', 'embrace_dio']
+      fail-fast: true
+      max-parallel: 1  # Publish the packages in sequential order
+
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v4
+
+      - name: 🐦 Setup Flutter
+        uses: embrace-io/flutter-action@v2
+        with:
+          flutter-version: '3.3.1'
+          channel: stable
+          cache: true
+
+      - name: Get Publishing Credentials
+        run: |
+          mkdir -p $XDG_CONFIG_HOME/dart
+          cat <<EOF > $XDG_CONFIG_HOME/dart/pub-credentials.json
+          ${{ secrets.FLUTTER_PUB_CREDENTIALS }}
+          EOF
+
+      - name: Publish Dry Run
+        run: |
+          cd ${{ matrix.package }}
+          flutter config --no-analytics
+          flutter pub publish --dry-run
+
+      - name: Publish
+        if: ${{ inputs.dry-run == false }}
+        run: |
+          cd ${{ matrix.package }}
+          flutter pub publish -f

.github/workflows/release.yaml

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+name: Release
+
+env:
+  REPO_PATH: 'embrace-flutter-sdk'
+  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+on:
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        description: 'Validate but do not push the package'
+        type: boolean
+        required: true
+  workflow_call:
+    inputs:
+      dry-run:
+        description: 'Validate but do not push the package'
+        type: boolean
+        required: true
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  verify-versions:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          lfs: true
+          path: ${{ env.REPO_PATH }}
+
+      - name: Setup yq
+        run: |
+          sudo snap install yq
+
+      - name: Verify Package Versions
+        run: |
+          cd ${{ env.REPO_PATH }}
+          ./verify_versions.sh
+
+  publish-packages:
+    name: Publish Packages
+    needs: verify-versions
+    uses: ./.github/workflows/publish_flutter_packages.yaml
+    with:
+      dry-run: ${{ inputs.dry-run }}
+    secrets: inherit
+
+  create-release:
+    name: Create Release
+    needs: publish-packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          lfs: true
+          path: ${{ env.REPO_PATH }}
+
+      - name: Setup yq
+        run: |
+          sudo snap install yq
+
+      - name: Parse Version
+        run: |
+          cd ${{ env.REPO_PATH }}
+          export PACKAGE_VERSION=$(yq -r .version embrace/pubspec.yaml)
+          echo "${PACKAGE_VERSION}"
+          echo "PACKAGE_VERSION=$PACKAGE_VERSION" >> $GITHUB_ENV
+
+      - name: Tag commit
+        run: |
+          cd ${{ env.REPO_PATH }}
+          git config --global user.name "embrace-ci"
+          git config --global user.email "[email protected]"
+          git tag -a ${{ env.PACKAGE_VERSION }} -m "${{ env.PACKAGE_VERSION }}"
+
+      - name: Push Tag
+        if: ${{ inputs.dry-run == false }}
+        run: |
+          cd ${{ env.REPO_PATH }}
+          git push --tags
+
+      - name: Create Release
+        if: ${{ inputs.dry-run == false }}
+        run: |
+          cd ${{ env.REPO_PATH }}
+          gh release create ${{ env.PACKAGE_VERSION }} -t ${{ env.PACKAGE_VERSION }} -F embrace/CHANGELOG.md
+
+      - name: Record SDK Version History
+        if: ${{ inputs.dry-run == false }}
+        run: |
+          curl -X POST ${{ vars.SDK_VERSION_URL }}/flutter/version/ -H 'X-Embrace-CI: ${{ secrets.SDK_VERSION_TOKEN }}' -H 'Content-Type: application/json' -d '{"version": "${{ env.PACKAGE_VERSION }}"}'

.github/workflows/release_candidate_merged.yaml

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+# Invokes the release workflow whenever a release candidate PR is merged
+name: RC Release
+
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  publish:
+    if: contains(github.event.pull_request.labels.*.name, 'release-candidate') && github.event.pull_request.merged == true
+    name: Publish Release
+    uses: ./.github/workflows/release.yaml
+    with:
+      dry-run: false
+    secrets: inherit

.github/workflows/release_candidate_pr.yaml

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+# Invokes the release workflow in dry-run mode whenever a release candidate PR is opened or updated
+name: RC-PR
+
+on: pull_request
+
+jobs:
+
+  rc-publish-dry-run:
+    name: Publish Release (dry-run)
+    if: contains(github.event.pull_request.labels.*.name, 'release-candidate')
+    uses: ./.github/workflows/release.yaml
+    with:
+      dry-run: true
+    secrets: inherit