Seprating Routes Function From app.py

- version : 2.1
- description : I have applied the seperation in the backend code and
  fixed some errors here and there ...like the typing error in routes/students.py
  ... I have replaced it with 'Any' type until I find A better solution
  for that .
//############################################//
	modified:   app.py
	new file:   extentions.py
	new file:   routes/__init__.py
	new file:   routes/csv.py
	new file:   routes/points.py
	new file:   routes/students.py
//############################################//

extentions.py

@@ -0,0 +1,4 @@
+# extensions.py
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()