[Feature-DevTools] Generate relationship columns for relationships instead of text fields

[pedja1982]

Bug report

What I did

I created two models, "Category" and "Product." Products have a category ID in the table. When I generate CRUD (Create, Read, Update, Delete) operations in Devtools, I don't get a select option; instead, I get a regular input where I need to enter the category ID.

What I expected to happen

I expected the CRUD to generate a dropdown/select field instead of an input field.

What happened

CRUD works without a relationship. I manually enter the integer.

What I've already tried to fix it

I tried to find it in the documentation, but such a basic thing does not exist in the documentation. The documentation is quite poor.

Is it a bug in the latest version of Backpack?

After I run composer update backpack/crud the bug... is it still there?
YES

Backpack, Laravel, PHP, DB version

When I run php artisan backpack:version the output is:

### PHP VERSION:
PHP 8.1.4 (cli) (built: Mar 25 2022 14:25:19) (ZTS Visual C++ 2019 x64)
Copyright (c) The PHP Group
Zend Engine v4.1.4, Copyright (c) Zend Technologies

### LARAVEL VERSION:
10.33.0.0

### BACKPACK PACKAGE VERSIONS:
backpack/basset: 1.2.2
backpack/crud: 6.3.0
backpack/devtools: 3.0.2
backpack/editable-columns: 3.0.2
backpack/generators: v4.0.2
backpack/pro: 2.0.18
backpack/theme-tabler: 1.1.1

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[pxpm]

Thanks for the suggestion @pedja1982

I've edited the title and moved it here as I don't think this is a bug. Well, I am sure this is not a bug, it's something we haven't implemented yet.

We are currently running a pool of the next features we should built, if you think more people would like to have this, please suggest it in #751 and if more people want it, we will built it 🙏

Cheers