Create Models for Account and Transaction

[Vaibhav-22-dm]

Expected Behavior:

• Account Model should have following fields: _ifsc, account_number, account_opening_date, account_type, bank_name, branch_address, branch_name, phonenumber
• Transaction Model should have following fields: date, description, debit, credit, balance, account (foreign key)
• Check Database Schema sheet in google sheet for reference: link