Frontend additions for stocks feature

[varunm532]

Completed:

• made a page where you can buy the top 25 stocks
  • Connected backend display API endpoint to show the stocks, price, and quantity from database table named stocks
  • used transition API endpoint to log transactions by specific users in stock_transation table in database.
• made a portfolio page where it shows how many stocks a person owns
• made a transaction log page to show the transaction history of users
• added feature to show how much money the user has

  Incomplete:

• need to add js sell code
• need to add js code to display graph representing portfolio money change

[varunm532]

Completed

• added js sell code
• added js/html graph code