Skip PHP CI jobs when only non-PHP files change

Replace workflow-level paths-ignore with per-job filtering using
dorny/paths-filter. PHP lint and test jobs now only run when PHP-related
files (app/, config/, database/, routes/, tests/, composer.*, phpunit.xml)
are modified.

.github/workflows/check.yaml

@@ -3,28 +3,41 @@ name: Check
 # Run this workflow every time a new commit pushed to your repository
 on:
     push:
-        paths-ignore:
-            - '.github/**/*'
-            - '**/*.md'
-            - 'public/build/*.js'
-            - 'public/build/**/*.js'
-            - 'docker/**/*'
-            - 'resources/scripts/**/*'
         tags-ignore:
             - "*"
         branches-ignore:
             - 'translations'
     pull_request:
-        paths-ignore:
-            - '**/*.md'
-            - 'public/build/*.js'
-            - 'public/build/**/*.js'
         branches-ignore:
             - 'translations'
     # Allow manually triggering the workflow.
     workflow_dispatch:
 
 jobs:
+    changes:
+        name: 🔍 Detect changes
+        runs-on: ubuntu-latest
+        outputs:
+            php: ${{ steps.filter.outputs.php }}
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v4
+
+            - name: Check for file changes
+              uses: dorny/paths-filter@v3
+              id: filter
+              with:
+                  filters: |
+                      php:
+                          - 'app/**'
+                          - 'config/**'
+                          - 'database/**'
+                          - 'routes/**'
+                          - 'tests/**'
+                          - 'composer.json'
+                          - 'composer.lock'
+                          - 'phpunit.xml'
+
     kill_previous:
         name: 0️⃣ Kill previous runs
         runs-on: ubuntu-latest
@@ -41,6 +54,8 @@ jobs:
         runs-on: ubuntu-latest
         needs:
             - kill_previous
+            - changes
+        if: needs.changes.outputs.php == 'true'
         steps:
             - name: Set up PHP
               uses: shivammathur/setup-php@v2
@@ -60,6 +75,8 @@ jobs:
         name: 2️⃣ PHP ${{ matrix.php-version }} Tests
         needs:
             - php_syntax_errors
+            - changes
+        if: needs.changes.outputs.php == 'true'
         runs-on: ubuntu-latest
         strategy:
             matrix: