feat(utils): adds routes constants dictionary and db utils

app/utils/route_const.py

@@ -0,0 +1,10 @@
+ROUTES = {
+  'home': '/',
+  'users': {
+    'login' : '/users/login',
+    'register' : '/users/register',
+  },
+  'pets': '/pets',
+  'about-us' : '/us/about',
+  'contact-us' : '/us/contact'
+}