add test for PRs

.github/workflows/test.pkl

@@ -0,0 +1,18 @@
+// pkl eval --format yaml -o test.yml test.pkl
+
+amends "package://pkg.pkl-lang.org/github.com/jamesward/pklgha/[email protected]#/GitHubAction.pkl"
+import "package://pkg.pkl-lang.org/github.com/jamesward/pklgha/[email protected]#/GitHubAction.pkl"
+
+on {
+  pull_request {
+
+  }
+}
+
+jobs {
+  ["test"] = new {
+    `runs-on` = "ubuntu-latest"
+
+    steps = GitHubAction.Scala.sbtTestSteps(null, null, null)
+  }
+}

.github/workflows/test.yml

@@ -0,0 +1,14 @@
+# Generated file. DO NOT EDIT.
+'on':
+  pull_request: {}
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        distribution: temurin
+        java-version: '20'
+        cache: sbt
+    - run: sbt test