feat(nit): structure cleanup

[JacobCoffee]

What

• It would be nice to pull the code bits into a project directory, either app/ or src/app/ or whatever. Everything being top-level makes me hurt inside.
• It would also be nice to pull the respective templates into their app directories e.g., templates/jobs/ -> src/jobs/templates/

[MainakSil]

Please tell which code bits would you like to pull into the project directory app/ or src/app/