feat: add universities and restaurants (#4)

Features:
- Allow to search for individual resources by their name
- Add new resources and their handler: Universities, Restaurants
- Added new parameter to reverse output order

Reviewed-on: #4
Co-authored-by: bdoerfchen <git@bissendorf.co>
Co-committed-by: bdoerfchen <git@bissendorf.co>

core/handler/params.go

@@ -0,0 +1,6 @@
+package handler
+
+const (
+	ParamDate     string = "date"
+	ParamLocation string = "location"
+)