Create UI for students to place orders

[h-m-m]

Summary

Create a page where you can add an order

Things out of Scope

Permissions and authorization will be in a separate issue

Things to Consider

Nice to have:

• canceling an order before it has been executed

Criteria for Completion

• A student can choose a stack and enter a number of shares
• The order record gets created if the student has enough cash on hand to cover the purchase
• The order will not be created otherwise