Allow dropdown inputs to be manually enabled for DnD questions for accessibility

[sjd210]

Adds an accessibility setting to "Enable non-dragging alternative inputs". For now this only affects cloze/drag-and-drop questions, but is defined broadly enough that we can use the same setting for other inputs in the future (e.g. depending on how we implement reorder question accessibility).

Also adds a Dropdown/Drag and drop override toggle to all question pages containing these question types (in the same place as the context switcher on concept pages). The toggle is defaulted to Dropdown only for logged-in users who have the accessibility setting enabled or for mobile users (those at xs screen or <=md touchscreen), and to Drag and drop in all other cases. Toggling will affect all drag and drop questions on the page. If manually toggled, this state will persist between screensizes - otherwise it will be reactive as before.

Also requires https://github.com/isaacphysics/isaac-sops-config/pull/22 for new accessibility setting to work.

[codecov]

Codecov Report

❌ Patch coverage is 49.01961% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.70%. Comparing base (3ebccb7) to head (95f5618).
⚠️ Report is 25 commits behind head on main.

Files with missing lines	Patch %	Lines
...pp/components/content/IsaacDragAndDropQuestion.tsx	0.00%	12 Missing ⚠️
src/app/components/content/IsaacClozeQuestion.tsx	0.00%	5 Missing ⚠️
src/app/components/elements/PageMetadata.tsx	82.35%	3 Missing ⚠️
...onents/elements/markup/portals/InlineDropZones.tsx	0.00%	2 Missing ⚠️
...ents/elements/panels/UserAccessibilitySettings.tsx	33.33%	2 Missing ⚠️
src/app/state/reducers/userState.ts	75.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2159      +/-   ##
==========================================
- Coverage   43.75%   43.70%   -0.05%     
==========================================
  Files         593      594       +1     
  Lines       25036    25084      +48     
  Branches     7427     7436       +9     
==========================================
+ Hits        10954    10963       +9     
- Misses      14032    14072      +40     
+ Partials       50       49       -1     

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