[Interactive Graph] Polygon side snapping is keyboard accessible.

[catandthemachines]

Summary:

Updating Polygon interactive graph implementation to have keyboard accessible side snapping. This is done by hooking up the side snapping behavior into a constraint function to make to keyboard arrow keys.

Issue: LEMS-2243

Test plan:

• Go to: /?path=/story/perseuseditor-widgets-interactive-graph--interactive-graph-polygon
• Set Snap to: to side measures
• Use your keyboard (tab and arrow keys) to move the various polygon points.
• Notice they now move!

[github-actions]

Size Change: +1.33 kB (+0.15%)

Total Size: 874 kB

Filename	Size	Change
packages/perseus/dist/es/index.js	369 kB	+1.33 kB (+0.36%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39.5 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	11.1 kB
packages/math-input/dist/es/index.js	78.2 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	29.8 kB
packages/perseus-editor/dist/es/index.js	276 kB
packages/perseus-linter/dist/es/index.js	22.8 kB
packages/perseus-score/dist/es/index.js	20.6 kB
packages/perseus/dist/es/strings.js	6.74 kB
packages/pure-markdown/dist/es/index.js	4.14 kB
packages/simple-markdown/dist/es/index.js	13.1 kB

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[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (dc422cf) and published it to npm. You
can install it using the tag PR2270.

Example:

pnpm add @khanacademy/perseus@PR2270

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

./dev/tools/bump_perseus_version.sh -t PR2270