Improve GitHub workflow configurations

Improvements to GitHub workflow configurations:
- Fixes code style issues
- Improves naming of files, workflows and jobs
- Adds scheduled workflow for dependency validation
- Allows the check for outdated Symfony recipes to fail

Author: codedmonkey

.github/workflows/linting-dependencies.yaml

@@ -46,5 +46,4 @@ jobs:
       # todo fail when composer.lock changed and there is an outdated recipe
       - name: Check if any Symfony recipes are outdated
         if: always() && steps.install.outcome == 'success'
-        continue-on-error: true
         run: composer recipes --outdated