Increase testability through dependency injection

- Remove existing integration tests for hooks as they're redundant after
  this change.
- Document the pattern in relevant documentation.
- Introduce `useEnvironment` to increase testability.
- Update components to inject dependencies rather than importing hooks
  directly.

src/presentation/components/Shared/Hooks/README.md

@@ -0,0 +1,5 @@
+# Hooks
+
+This folder contains shared hooks used throughout the application.
+
+To use the hooks, prefer using Vue-native `provide` / `inject` pattern to keep the components independently testable without side-effect.