add(#4): some useful flows

.github/workflows/dependencies.yaml

@@ -0,0 +1,15 @@
+name: Check dependencies
+on:
+  push:
+    tags-ignore:
+      - "**"
+  # additionally run once per week (At 00:00 on Sunday) to maintain cache
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  antq:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: liquidz/antq-action@main

.github/workflows/git.yaml

@@ -0,0 +1,13 @@
+name: Git checks
+
+on:
+  pull_request:
+
+jobs:
+  block-fixup:
+    name: Block merge with fixup commits
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: 13rac1/block-fixup-merge-action@v2.0.0