[polish] Print env help even if we're not in a project dir

[ipince]

Summary

Before:

> launchpad env
2022/11/16 14:35:55 ABORT: There was an error. The cause is:
	 'launchpad env' only works within a Launchpad project's directory. Please change your current directory to a Launchpad project and try again.
Run with --debug for more information

After:

> launchpad env
Manage environment variables and secrets

Securely stores and retrieves environment variables on the cloud.
...(clipped)

How was it tested?

Running launchpad env and launchpad env ls

Is this change backwards-compatible?

Yes

[LucilleH]

oh noice!