Add OS matrix for Ubuntu, Windows and macOS

.github/workflows/bld.yml

@@ -4,11 +4,13 @@ on: [ push, pull_request, workflow_dispatch ]
 
 jobs:
   build-bld-project:
-    runs-on: ubuntu-latest
-
     strategy:
       matrix:
         java-version: [ 17, 21, 24 ]
+        kotlin-version: [ 1.9.25, 2.0.21, 2.1.20 ]
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout source repository
@@ -22,12 +24,16 @@ jobs:
           distribution: "zulu"
           java-version: ${{ matrix.java-version }}
 
-      - name: Download dependencies
-        run: ./bld download
-
       - name: Download dependencies [examples]
         working-directory: examples
         run: ./bld download
 
-      - name: Run tests
+      - name: Run tests [examples]
+        working-directory: examples
         run: ./bld compile test
+
+      - name: Download dependencies
+        run: ./bld download
+
+      - name: Run tests
+        run: ./bld compile test

examples/.idea/bld.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="BldConfiguration">
+    <events />
+  </component>
+</project>