Derek/JOB-164 BE Company Verification System

[derekxu04]

• Added verifiedCompaniesAddresses column to AdminAccount entity
• Implemented GET route /admin/verified-companies-addresses and tests
• Implemented POST route /admin/verified-companies-addresses/add and tests
• Implemented POST route /admin/verified-companies-addresses/delete and tests (POST works better here i think vs DELETE because it can have a request body)
• Updated backend documentation
• Made sure all functions in admin.ts return a new web token (not msg: undefined)

Incomplete:

• I haven't modified CompanyFunction.CreateCompany to return verified: true/false yet - wouldn't that require an adminId to query the database with? Or do I just get the first adminAccount or something

Notes:

• How many admin accounts are there? Because, for example, adding addresses right now is only adding the addresses to one of the AdminAccounts rather than all of them
• Some of my unit tests that require two api calls (one for adding, one for getting to check that it was actually added) look a bit funky - is there a better way?