ci: add pr lint workflow (#21)

Closes #19.

.github/workflows/pr-lint.yml

@@ -0,0 +1,14 @@
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/stylua.yml

@@ -1,4 +1,3 @@
-name: PR checks
 on:
   pull_request:
     branches: