✨(frontend) integrate configurable Waffle

Integrate Waffle component based on LaGaufreV2
from @gouvfr-lasuite/ui-kit.
Waffle will be fully configurable via the app config,
allowing to be set through environment variables
and api-provided configuration.

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Added 
+
+- ✨(frontend) integrate configurable Waffle #1795
+
 ### Fixed
 
 - ✅(e2e) fix e2e test for other browsers #1799