Added CI job which tests fronted

[NaomiGonz]

• Created a simple test script to test IndexPage()
• Created a ci.yml file that runs a frontend_test which uses jest to test all frontend components based on .test.js scripts
• Deleted files such a node_modules/, package.json, and package-lock.json which were incorrectly placed in the root directory when they should only be in the ./PhonePayBudgetTracker/ directory