ci: add sample kubernetes pipeline

.drone.yml

@@ -0,0 +1,17 @@
+kind: pipeline
+type: kubernetes
+name: hello
+
+steps:
+  - name: hello
+    image: alpine:3.20
+    commands:
+      - echo "hello from Drone kube runner"
+      - echo "repo=${DRONE_REPO} event=${DRONE_BUILD_EVENT} build=${DRONE_BUILD_NUMBER}"
+      - echo "commit=${DRONE_COMMIT_SHA}"
+      - uname -a
+  - name: workspace
+    image: alpine:3.20
+    commands:
+      - ls -la
+      - cat README.md