feat: add collections support for containers [FC-0083]

[rpenido]

Description

This PR adds support to add Units to Collections.

Supporting information

• Implements part of Tags+Collections can be added to Units #1648
• Depends on feat: collections support for containers [FC-0083] edx-platform#36504

Testing Instructions

Using the sidebar

• Click on a Unit to show the sidebar
• Navigate to the Organize tab
• Select some collections and save
• Open the collection and check if the Unit was added
• Remove the unit from the collection using the menu from the Unit Card
• Check if the unit was removed from the Collection

Using the card menu

• Open the menu from a Unit card
• Click on the "Add to collection" menu item
• Check if the sidebar opens with the Collection widget open and in Edit mode
• Select some collections and save
• Open the collection and check if the Unit was added
• Remove the unit from the collection using the menu from the Unit Card
• Check if the unit was removed from the Collection

Using the component picker

• Open a Collection
• Click on "+ New" and then on "Existing Library Content"
• Select a unit and click on "Add to Collection"
• Check if the Unit was correctly added

Creating a unit directly inside a collection

• Open a Collection
• Click on "+ New" and then on "Unit"
• Fill the form and click on "Create"
• Check if the Unit was correctly created and added to the collection

Check if you can NOT add a unit in the Unit Outline

• Open a Unit Outline for an existing Course Unit
• On the "Add a new component" widget, click on "Library Content (beta)"
• Check that no Units are shown on the component picker

---

Private ref: FAL-4068

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[codecov]

Codecov Report

Attention: Patch coverage is 97.48428% with 4 lines in your changes missing coverage. Please review.

Project coverage is 93.56%. Comparing base (6818542) to head (bbdf3d4).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/library-authoring/components/ContainerCard.tsx	92.30%	2 Missing ⚠️
.../library-authoring/create-unit/CreateUnitModal.tsx	87.50%	1 Missing ⚠️
src/library-authoring/units/LibraryUnitBlocks.tsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1797      +/-   ##
==========================================
+ Coverage   93.55%   93.56%   +0.01%     
==========================================
  Files        1136     1139       +3     
  Lines       23245    23308      +63     
  Branches     5013     5022       +9     
==========================================
+ Hits        21746    21808      +62     
- Misses       1423     1424       +1     
  Partials       76       76              

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[pomegranited]

👍 This is working beautifully @rpenido !

• I tested this by adding/removing Units and Components to/from Collections using the "Organize" tab and the "add existing content" component picker.
• I read through the code
• I checked for accessibility issues by using my keyboard to navigate
• Includes documentation
• User-facing strings are extracted for translation

[pomegranited]

Oo good catches!

[bradenmacdonald]

LGTM! If you can fix the conflicts and get the coverage tests passing, I'll merge it for you.

[bradenmacdonald]

How does a Component ever have a usageKey but not a blockType ? Or is this really an ItemPicker that can select non-components?

[rpenido]

I was planning not to pass blockType when selecting 'Units', but I ended up passing it as the containerType has a similar meaning. Reverted 0962eab

[bradenmacdonald]

Nit: this file can be .ts not .tsx.

[rpenido]

Fixed: 0962eab

[rpenido]

LGTM! If you can fix the conflicts and get the coverage tests passing, I'll merge it for you.

Thanks for the review @bradenmacdonald!
We still need to get openedx/edx-platform#36504 merged first (which depends on openedx/openedx-learning#299) because we changed the API collection endpoint from collection/:collecionId/components to collection/:collecionId/items there.