Collect first and last names

[erikguntner]

Closes #660

What changes did you make?

• Added fields for first and last name to sign up form
• Update validation schema for first and last name
• Updated requests to signup/host and signup/coordinator to include firstName and lastName properties
• Updated request types for services
• Wrote unit tests for sign up form and e2e tests testing happy path of signing up
• The only changes made to app/cypress/e2e/test-authentication.cy.ts were solely prettier formatting

  Rationale behind the changes?

• We need to collect first and last names when a user is created in order to properly display their names

  Testing done for these changes

• Wrote unit and e2e tests

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

Visuals before changes are applied

Visuals after changes are applied