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

app/utils/db_utils.py

@@ -0,0 +1,16 @@
+from app.extensions import db
+from app.models.user import User
+from app.models.pet import Pet
+from app.models.pet_kind import PetKind
+from app.models.adoptions import Adoptions
+from app.models.adoption_status import AdoptionStatus
+
+class DBUtils():
+  def setup_db(app):
+    if not app:
+      Exception("this function needs app context to be ran, please provide app")
+    with app.app_context():
+      db.create_all()
+
+  def drop_db():
+    db.drop_all()