chore: enforce semantic PR title (#3313)

### Description

We decided to use semantic PR title as it can help with automated
releases and changelog generation.

Already used in valora-inc/logging#7 and
valora-inc/typescript-app-starter#51

### Test plan

N/A

### Related issues

Discussed on
[Slack](https://valora-app.slack.com/archives/C025V1D6F3J/p1669991436336709).

### Backwards compatibility

N/A

.github/workflows/semantic-pr.yml

@@ -0,0 +1,18 @@
+name: Semantic PR title
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+jobs:
+  semantic-pr-title:
+    name: Semantic PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}