Add an option to create apps (as crates in a workspace) in Cot CLI

[m4tx]

To promote code reusability and separation of responsibilities, it would be nice to have an subcommand to create apps in the Cot CLI. This would create another crate inside the current workspace (possibly converting the existing Cargo.toml into a workspace if needed) that would contain a structure implementing the App trait.

[fu050409]

Hi, @m4tx! I'm very interested in contributing to cot-rs.

I see that this is marked as a good first issue, and it looks relatively easy to implement. However, since this is my first time contributing to cot, it might take me a while to familiarize myself with cot's code, and I was wondering if you'd mind if I try to finish it? :D

[m4tx]

@fu050409 sure, go for it! This isn't an urgent feature to implement, so don't worry about the time. I can assign the issue to you if you want.

[ElijahAhianyo]

hey @fu050409, still looking into this?

[fu050409]

@ElijahAhianyo Yes, I am still continuing this work. I apologize for not replying for a long time, I was looking for a job some time ago and then there was an outbreak of the Influenza A virus here which stalled me again for a while. So I had to postpone this work until now and I've only just recovered, I'll then continue this work.