Add autoreview and semgrep workflow

.github/workflows/autoreview.yml

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+name: Auto reviews release
+on: pull_request
+jobs:
+  reviews:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Auto reviews branches
+        uses: golfzaptw/[email protected]
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN}}
+          EVENT_TYPE: APPROVE
+          BRANCHES: master
+          AUTHOR: romovs
+          MESSAGE: Approved

.github/workflows/semgrep.yml

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+on:
+  workflow_dispatch: {}
+  pull_request: {}
+  push:
+    branches:
+    - main
+    - master
+    paths:
+    - .github/workflows/semgrep.yml
+  schedule:
+  # random HH:MM to avoid a load spike on GitHub Actions at 00:00
+  - cron: 17 22 * * *
+name: Semgrep
+jobs:
+  semgrep:
+    name: semgrep/ci
+    runs-on: ubuntu-20.04
+    env:
+      SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}
+    container:
+      image: returntocorp/semgrep
+    steps:
+    - uses: actions/checkout@v3
+    - run: semgrep ci