feat: Add --env-path specify env path

[Zeko369]

Continuation of #352 with by making it so you can also load/output .env files for a different path (i.e. in out case we'd end up with 35+ top level .env files)

TODO

• [ ] Docs

[snopoke]

+1 this would great and also solves the case where the project already uses a .env file for local dev.

[jdelStrother]

Anything we can do that would help get this merged? I see it has conflicts - if I fixed them would there be any interest in merging it?

[igor-alexandrov]

@djmb this is not relevant anymore with Kamal 2.

[djmb]

Secrets have moved to .kamal/secrets in Kamal 2