Add staff application feature with API integration and frontend form implementation

open_api/src/main/resources/schemas/generic/components.yml

@@ -0,0 +1,18 @@
+components:
+  schemas:
+    FormResponse:
+      type: object
+      required:
+        - id
+        - message
+        - verified_mail
+      properties:
+        id:
+          type: string
+          description: Unique identifier for the submitted form for referring to it later
+        message:
+          type: string
+          description: Confirmation message
+        verified_mail:
+          type: boolean
+          description: If this user has verified their mail already