build dokka docs in CI

.github/workflows/ci.yml

@@ -395,3 +395,22 @@ jobs:
         with:
           name: rust-test-results
           path: test-results/rust-test-results.xml
+
+  kotlin-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          distribution: "adopt"
+          java-version: "11"
+      # Cache Maven repo
+      - uses: actions/cache@v3
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+      - run: mvn dokka:dokka
+        working-directory: bound/kt