ci: add paths filters to caller workflows (#14)

Scopes each migrated CI workflow to the file types that affect it,
following the recommended caller stanzas documented in the
github-workflows-public reusables. No behavior change beyond skipping
runs on irrelevant paths.

Author: kojiromike

.github/workflows/composer-normalize.yml

@@ -4,9 +4,15 @@ on:
   push:
     branches:
       - main
+    paths:
+      - composer.json
+      - .github/workflows/composer-normalize.yml
   pull_request:
     branches:
       - main
+    paths:
+      - composer.json
+      - .github/workflows/composer-normalize.yml
 
 jobs:
   composer-normalize:

.github/workflows/composer-require-checker.yml

@@ -4,9 +4,21 @@ on:
   push:
     branches:
       - main
+    paths:
+      - composer.json
+      - composer.lock
+      - '**.php'
+      - .composer-require-checker.json
+      - .github/workflows/composer-require-checker.yml
   pull_request:
     branches:
       - main
+    paths:
+      - composer.json
+      - composer.lock
+      - '**.php'
+      - .composer-require-checker.json
+      - .github/workflows/composer-require-checker.yml
 
 jobs:
   composer-require-checker:

.github/workflows/composer-validate.yml

@@ -4,9 +4,15 @@ on:
   push:
     branches:
       - main
+    paths:
+      - composer.json
+      - .github/workflows/composer-validate.yml
   pull_request:
     branches:
       - main
+    paths:
+      - composer.json
+      - .github/workflows/composer-validate.yml
 
 jobs:
   composer-validate:

.github/workflows/php-syntax-check.yml

@@ -4,9 +4,15 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.php'
+      - .github/workflows/php-syntax-check.yml
   pull_request:
     branches:
       - main
+    paths:
+      - '**.php'
+      - .github/workflows/php-syntax-check.yml
 
 jobs:
   php-syntax-check:

.github/workflows/phpcs.yml

@@ -4,9 +4,19 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.php'
+      - .phpcs.xml*
+      - phpcs.xml*
+      - .github/workflows/phpcs.yml
   pull_request:
     branches:
       - main
+    paths:
+      - '**.php'
+      - .phpcs.xml*
+      - phpcs.xml*
+      - .github/workflows/phpcs.yml
 
 jobs:
   phpcs:

.github/workflows/phpstan.yml

@@ -4,9 +4,25 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.php'
+      - phpstan.neon
+      - phpstan.neon.dist
+      - phpstan-baseline.neon
+      - composer.json
+      - composer.lock
+      - .github/workflows/phpstan.yml
   pull_request:
     branches:
       - main
+    paths:
+      - '**.php'
+      - phpstan.neon
+      - phpstan.neon.dist
+      - phpstan-baseline.neon
+      - composer.json
+      - composer.lock
+      - .github/workflows/phpstan.yml
 
 jobs:
   phpstan:

.github/workflows/rector.yml

@@ -4,9 +4,21 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.php'
+      - rector.php
+      - composer.json
+      - composer.lock
+      - .github/workflows/rector.yml
   pull_request:
     branches:
       - main
+    paths:
+      - '**.php'
+      - rector.php
+      - composer.json
+      - composer.lock
+      - .github/workflows/rector.yml
 
 jobs:
   rector:

.github/workflows/tests.yml

@@ -4,9 +4,23 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.php'
+      - composer.json
+      - composer.lock
+      - phpunit.xml
+      - phpunit.xml.dist
+      - .github/workflows/tests.yml
   pull_request:
     branches:
       - main
+    paths:
+      - '**.php'
+      - composer.json
+      - composer.lock
+      - phpunit.xml
+      - phpunit.xml.dist
+      - .github/workflows/tests.yml
 
 jobs:
   test: