Ux init

[rumpl]

- What I did

Made UX changes to the init subcommand:

• removed the maintainer flag
• removed the description flag
• removed implicit compose file search

- How I did it

Removed a bunch of code.

- How to verify it

Run docker app init --help, the flags description and maintainer should no longer be there.

- Description for the changelog Docker App doesn't implicitly select a docker-compose.yml file on init. The flags --description and --maintainer heve been removed.

- A picture of a cute animal (not mandatory but encouraged)

[jcsirot]

Argh, I already merged it. My bad 😢