[src/{bin/main,global,lib}.rs] Add new additional_derives vec CLI opt…

[SamuelMarks]

; [src/code.rs] Fix type elision warning

Basically I am getting this issue:

error[E0277]: the trait bound `models::profiles_tbl::generated::CreateProfilesTbl: ToSchema` is not satisfied
  --> src/routes/profile.rs:67:32
   |
67 |     form: actix_web::web::Json<CreateProfilesTbl>,
   |                                ^^^^^^^^^^^^^^^^^ unsatisfied trait bound

utoipa::ToSchema needs to be on the struct. But it's a bit too specific to make it to this library/cli, and regardless doesn't futureproof dsync.

So this just lets you add arbitrary derives as strings. As many as your heart desires.

--help

  -d, --derive <ADDITIONAL_DERIVES>
          Add these additional derives to each generated `struct`

[hasezoey]

Thanks for this change, this was likely overdue.

Though there are some extra changes that should be done:

• the commit message style we use is conventional/angular (though with the scope of this PR, i might just squash and change the message myself)
• add tests for this new option (see existing tests for examples)
• remove the Option wrapping as listed in the comments below

[hasezoey]

Looks better, tests are still missing though. See simple_table_sqlite for a simple example.