add: pipeline event based triggering

.woodpecker/.backend.yml

@@ -3,6 +3,7 @@ variables:
   - &java_image "gradle:8.5.0-jdk17"
 when:
   path: "app/**"
+  event: [push, tag]
 clone:
   git:
     image: woodpeckerci/plugin-git

.woodpecker/.documentation.yml

@@ -1,6 +1,7 @@
 ---
 when:
   path: "documentation/**"
+  event: [push, tag]
 variables:
   - &frontend_image "cl00e9ment/node.js-builder:git"
 clone:

.woodpecker/.frontend.yml

@@ -1,6 +1,7 @@
 ---
 when:
   path: "frontend/**"
+  event: [push, tag]
 variables:
   - &frontend_image "cl00e9ment/node.js-builder:git"
 clone:

.woodpecker/.lint_general.yml

@@ -1,4 +1,6 @@
 ---
+when:
+  event: [push, tag]
 clone:
   git:
     image: woodpeckerci/plugin-git