🌈 3️⃣ - Row coloring v3 - Add condition value provider

This MR implements the Conditional value provider:

Notes

• The component used to define filter has been refactored to be usable with this value provider
• The linked row names are now loaded through a dedicated endpoint even if the preload_values mechanism is still working. (Should I remove that?)
• When the user add a new color, the conditions are empty by default. This color is always applied and that's the way to have a default color instead of creating a special behaviour for that. This feature is easily discoverable.

Focus point

• Import/export should work for decoration.
• Changing the type of a field shouldn't break the filter. In this case the incompatible filters are removed.
• Should still work when we remove a field used in a condition.

Not yet implemented

• The dropdown are hidden by the modal. Should be fixed in a next release.

Vuejs lib considered for color list sorting (Obsolete)

• https://github.com/SortableJS/Vue.Draggable (17.1k ⭐) - Wrapper around [Sortable.js] developed by Sortable.js
• https://github.com/sagalbot/vue-sortable (718 ⭐) - a thin wrapper around Sortable.js (25k ⭐) - no update in 6 years and not compatible vue2
• https://github.com/arkdevuk/vue2-sortable (3 ⭐) vue2 version of the previous one. - Broken
• https://github.com/Vivify-Ideas/vue-draggable (295 ⭐) - Less obvious
• https://github.com/rlemaigre/Easy-DnD (278 ⭐) - Not for sortable but more general DnD use case
• https://github.com/nil/v-drag (39 ⭐) - Demo broken, not a good sign

Or I can also use the existing directive 😝

Merge Request Checklist

• changelog.md has been updated if required
• New/updated Premium features are separated correctly in the premium folder
• The latest Chrome and Firefox have been used to test any new frontend features
• Documentation has been updated
• Quality Standards are met
• Performance: tables are still fast with 100k+ rows, 100+ field tables
• The redoc API pages have been updated for any REST API changes
• Our custom API docs are updated for changes to endpoints accessed via api tokens
• The UI/UX has been updated following UI Style Guide

Related to #39 (closed)