cli "reflect" command

[franklx]

This PR contains a first working implementation of Models struct code-generation by using live database reflection.
Caveats:

• Uses my KVec implementation for one-to-many relations (not yet in repo);
• It's postgresql-only for now;
• It's usable but incomplete (see TODO comment in reflect.rs);
• It shouldn't be merged until KVec will be in repo (I'll open a dedicated PR);

[kurtbuilds]

Wow! This is super cool.

I previously was using a very similar workflow using ChatGPT when I was migrating a django app from Python to Rust in my last professional role.

Can I email you about the work you're doing? Very curious to hear what and how you're using this. (My email is in my profile if you're not comfortable sharing publicly.)

[eboody]

this would be so sick! this already an instant favorite crate and its not even done