Replace Maven CI pipeline with a simple "Hello World" workflow in .woodpecker.

.woodpecker/first-test.yml

@@ -0,0 +1,9 @@
+when:
+  - event: push
+    branch: main
+
+steps: hello
+    - name: hello
+      image: alpine
+      commands:
+        - echo "Hello World!"

.woodpecker/maven.yml

@@ -1,25 +0,0 @@
-name: CI Pipeline
-
-on:
-  push:
-    branches:
-      - develop
-      - 'feature**'
-  pull_request:
-    branches:
-      - develop
-  create:
-    tags:
-      - '*'
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    container:
-      image: maven:3-amazoncorretto-17-alpine
-
-    steps:
-      - name: Build with Maven
-        run: |
-          echo "Running package..."
-          mvn clean package