bug: `cortex models` should == `cortex models -h`

[Van-QA]

Description:
Running the cortex models command does not return any response.cortex models

Reproduction Steps:

1. Open a terminal.
2. Run cortex models.

Expected Behavior:
The command should return a list of available models or an error message if the command is not available.

Environment:
Github codespace
4 cores 16gb RAM

https://discord.com/channels/1107178041848909847/1204617960615055401/1253826168520445996

Request
Ideally: all commands should bring up -h

i.e.
For commands that would normal require args:

• cortex presets == cortex presets -h
• embeddings == embeddings
• benchmark ...
• everything

Not applicable to something like cortex serve which should jsut start the server...

[freelerobot]

@Van-QA I renamed the issue to be more specific.

@louis-jan its up to you in terms of deciding if the short hand is for list or -h

I'm ok with either.

Thanks for already updating cortex to be shorthand for cortex -h. Its helpful.