added manager, driver, order, route, vehicle, warehouse endpoints,models and migrations.

internal/handler/manager.go

@@ -0,0 +1,11 @@
+package handler
+
+import "net/http"
+
+func (s *Server) ListManagers(w http.ResponseWriter, r *http.Request) {}
+
+func (s *Server) CreateManager(w http.ResponseWriter, r *http.Request) {}
+
+func (s *Server) GetManager(w http.ResponseWriter, r *http.Request, slug string) {}
+
+func (s *Server) DeleteManager(w http.ResponseWriter, r *http.Request, slug string) {}