add workflows

Author: kanarus

.github/workflows/AutoApprove.yml

@@ -0,0 +1,23 @@
+# will be removed when this project has more than one maintainers
+
+name: AutoApprove
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+
+jobs:
+  approve:
+    if: |
+      github.event.pull_request.user.login == 'kanarus' &&
+      !github.event.pull_request.draft
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: approve
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh pr review ${{ github.event.number }} --approve

.github/workflows/CI.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [main, v*]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        toolchain: [stable, nightly]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - run: |
+          rustup update
+          rustup default ${{ matrix.toolchain }}
+      
+      - run: |
+          cargo build