add twig.yaml to demonstrate conflicts

Author: kbond

kbond/homepage-scaffold/0.1/config/packages/foo.yaml

@@ -0,0 +1,3 @@
+when@test:
+    twig:
+        strict_variables: true

kbond/homepage-scaffold/0.1/config/packages/twig.yaml

@@ -0,0 +1,8 @@
+twig:
+    default_path: '%kernel.project_dir%/templates'
+    form_themes:
+        - bootstrap_5_layout.html.twig
+
+when@test:
+    twig:
+        strict_variables: true