TEST!!! DO NOT REVIEW - [SR] Allow using control + shift + arrow keys for NVDA

[nishasy]

Summary:

todo

Issue: https://khanacademy.atlassian.net/browse/LEMS-2874

Test plan:

todo

[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (efd369a) and published it to npm. You
can install it using the tag PR2257.

Example:

pnpm add @khanacademy/perseus@PR2257

If you are working in Khan Academy's webapp, you can run:

./dev/tools/bump_perseus_version.sh -t PR2257

[github-actions]

Size Change: +143 B (+0.02%)

Total Size: 866 kB

Filename	Size	Change
packages/perseus/dist/es/index.js	367 kB	+143 B (+0.04%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	38.9 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	10.4 kB
packages/math-input/dist/es/index.js	77.6 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	29.6 kB
packages/perseus-editor/dist/es/index.js	275 kB
packages/perseus-linter/dist/es/index.js	22 kB
packages/perseus-score/dist/es/index.js	20.3 kB
packages/perseus/dist/es/strings.js	6.57 kB
packages/pure-markdown/dist/es/index.js	3.54 kB
packages/simple-markdown/dist/es/index.js	12.5 kB

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