[Feature] Launch Datatable component

[tabacitu]

In Backpack v7 we're adding the ability to include a datatable anywhere you want - on the Show page, on a Dashboard page, on a custom page, in a modal - anywhere.

This incredibly difficult work, that took MONTHS, has been done by @pxpm in the following PRs:

• PR to CRUD - [POC] datatable as a component for multiple cruds #5688 🟡 two small changes
• PR to PRO - https://github.com/Laravel-Backpack/PRO/pull/328 - 🟡 one small change
• PR to Demo - Datatables component example demo#697 - 🟢 READY!
• PR to EditableColumns - https://github.com/Laravel-Backpack/editable-columns/pull/101 - 🟢 READY!

To finish this feature, we have a few more things to do:

• @pxpm - fix trash filter in PRO
• @pxpm - fix Editable Columns
• @pxpm - write docs for datatable component and datatable widget (as mentioned here)
• @pxpm & @tabacitu - finish specs for filtering a datatable;
• @pxpm & @tabacitu - polish structure & naming in the DataTable class;
• @pxpm & @tabacitu - polish structure & naming in the CrudPanelManager class;

[tabacitu]

We've added comments here:

• https://github.com/Laravel-Backpack/CRUD/pull/5688/files?diff=unified&w=0
• https://github.com/Laravel-Backpack/demo/pull/697/files

[tabacitu]

Step 1. Finish the Breaking Changes

• PRO - as noted here, let's move the datatable widget to CRUD and fix the tests;
• CRUD - as noted here, rename datatable directory to components (same with the PHP class too)
• CRUD - here - use component namespace to have <bp-datatable> instead of <x-datatable>
• CRUD - here - ListOperation shouldn't know about the DataTable component; maybe hooks are the solution?
• CRUD - here review/change the comments I added to the code;
• CRUD - fix the tests

Step 2. Merge to next

When the above are done, we are READY. Let's merge the PRs to next!!!

Step 3. Polish

Then, there's a few things left to be done, to consider the datatable component polished and final:

• 🔴 @tabacitu to give a final eye on design inconsistencies and push pixels or make a list
• 🔴 @tabacitu to document this feature in the release notes
• 🔴 @pxpm & @tabacitu to include this in the upgrade guide
• 🔴 @pxpm to find ways to have the "add entry" button pre-populate with the parent ID (and document it)
• 🔴 @pxpm to find a way to include the table count in the component/widget as well
• 🔴 someone to fix DataTable component when using CoreUIv2 (dropdowns don't work, search bar looks weird)
• 🔴 someone to fix DataTable component when using CoreUIv4 (dropdowns don't work, search bar looks weird)
• 🟡 split up datatable_logic.blade.php into multiple blade or JS files, so a dev can override one feature they want

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