Added workflows

Author: DirtyNative

.github/workflows/ci.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - develop
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Dart
+        uses: dart-lang/setup-dart@v1
+        with:
+          sdk: 3.9.0
+
+      - name: Install dependencies
+        run: dart pub get
+
+      - name: Check formatting
+        run: dart format --output=none --set-exit-if-changed .
+
+      - name: Analyze
+        run: dart analyze
+
+      - name: Test
+        run: dart test

.github/workflows/publish.yml

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+name: Publish
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "v*.*.*"
+
+concurrency:
+  group: publish-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Dart
+        uses: dart-lang/setup-dart@v1
+        with:
+          sdk: 3.9.0
+
+      - name: Install dependencies
+        run: dart pub get
+
+      - name: Verify tag matches pubspec version
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          set -euo pipefail
+          VERSION=$(grep -E '^version:' pubspec.yaml | awk '{print $2}')
+          TAG="${GITHUB_REF_NAME}"
+
+          if [ "${TAG}" != "v${VERSION}" ]; then
+            echo "Tag (${TAG}) does not match pubspec.yaml version (v${VERSION})."
+            exit 1
+          fi
+
+      - name: Configure pub.dev credentials
+        env:
+          PUB_CREDENTIALS: ${{ secrets.PUB_CREDENTIALS }}
+        run: |
+          set -euo pipefail
+          test -n "$PUB_CREDENTIALS"
+          mkdir -p "$HOME/.config/dart"
+          printf '%s' "$PUB_CREDENTIALS" > "$HOME/.config/dart/pub-credentials.json"
+
+      - name: Publish
+        run: dart pub publish --force