Update folder name from api-v2 -> api and frontend-v2 -> frontend

[BrandonLim8890]

Description

The nastiest and largest change where all I'm doing is just renaming all folder with v2's to regular names. This now means that to run the app, we can't do dev:v2 and instead we just use dev

Type of change

Please tick the boxes that best match your changes.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• This requires a run of yarn install
• This has migration changes and requires a run of yarn dev:migration:run

How Has This Been Tested?

Tested all changes locally!

Checklist:

• I have run the production builds in docker for the frontend/backend and ensure things run fine. Check README of repo on how to run if not sure.
• I have performed a self-review of my own code
• I have commented my code where needed
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules