Refactor enums and update Interaction entity field

Moved enums to a dedicated namespace and updated references across the codebase. Renamed the `Info` field in the `Interaction` entity to `Info1`, including necessary migrations and UI adjustments. These changes improve the organization and consistency of the codebase.

FoodsharingSiegen.Contracts/Enums/ProspectStateFilter.cs

@@ -0,0 +1,13 @@
+namespace FoodsharingSiegen.Contracts.Enums
+{
+    public enum ProspectStateFilter
+    {
+        All = 0,
+
+        OnBoarding = 10,
+
+        Verification = 20,
+
+        Completed = 30
+    }
+}