build: woodpecker ci

.editorconfig

@@ -10,3 +10,6 @@ insert_final_newline = true
 [gradlew.bat]
 charset = latin1
 end_of_line = crlf
+
+[*.{yml,yaml}]
+indent_size = 2

.woodpecker.yml

@@ -0,0 +1,9 @@
+when:
+  - branch: develop
+    event: [manual]
+
+steps:
+  - name: build
+    image: "docker.io/library/eclipse-temurin:21-jdk-alpine"
+    commands:
+      - gradlew shadowJar