ci: setup workflow to validate pr title (#48)

Author: d3lm

.github/workflows/semantic-pr.yaml

@@ -0,0 +1,32 @@
+name: Semantic Pull Request
+on:
+  pull_request_target:
+    types: [opened, reopened, edited, synchronize]
+permissions:
+  pull-requests: read
+jobs:
+  main:
+    name: Validate PR Title
+    runs-on: ubuntu-latest
+    steps:
+      # https://github.com/amannn/action-semantic-pull-request/releases/tag/v5.5.2
+      - uses: amannn/action-semantic-pull-request@cfb60706e18bc85e8aec535e3c577abe8f70378e
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          subjectPattern: ^(?![A-Z]).+$
+          subjectPatternError: |
+            The subject "{subject}" found in the pull request title "{title}"
+            didn't match the configured pattern. Please ensure that the subject
+            doesn't start with an uppercase character.
+          types: |
+            fix
+            feat
+            chore
+            build
+            ci
+            perf
+            docs
+            refactor
+            revert
+            test