Move all source code into a src root folder

[myssto]

As of now, all source code for the app lives in the root of the repository alongside all configs and repo files. We should move this all into /src for better organization. Refactoring should ensure that all module imports are updated, CI / CD actions are checked for paths, etc.

Current:

/
|-- app/
    |-- *app router files*
|-- components/
    |-- *component files*
|-- middleware.ts
|-- package.json
|-- tsconfig.json
|-- eslint.rc
...

Proposed:

/
|-- src/
    |-- app/
        |-- *app router files*
    |-- components/
        |-- *component files*
    |-- middleware.ts
|-- package.json
|-- tsconfig.json
|-- eslint.rc
...