[SR] Ray graph - Add screen reader support for Ray interactive graph

[nishasy]

Summary:

Add the aria label and descriptions for the full graph and the
interactive elements in the Linear System graph, based on the
SRUX doc.

Issue: https://khanacademy.atlassian.net/browse/LEMS-1734

Test plan:

yarn jest packages/perseus/src/widgets/interactive-graphs/graphs/ray.test.tsx

Storybook
http://localhost:6006/iframe.html?globals=&args=&id=perseuseditor-widgets-interactive-graph--interactive-graph-ray&viewMode=story

Screen.Recording.2024-12-18.at.3.57.53.PM.mov

[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (f754610) and published it to npm. You
can install it using the tag PR2036.

Example:

yarn add @khanacademy/perseus@PR2036

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

./dev/tools/bump_perseus_version.sh -t PR2036

[github-actions]

Size Change: +228 B (+0.02%)

Total Size: 1.27 MB

Filename	Size	Change
packages/perseus/dist/es/index.js	418 kB	+81 B (+0.02%)
packages/perseus/dist/es/strings.js	5.22 kB	+147 B (+2.9%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	4.26 kB
packages/math-input/dist/es/index.js	78 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	1.48 kB
packages/perseus-editor/dist/es/index.js	688 kB
packages/perseus-linter/dist/es/index.js	22.2 kB
packages/pure-markdown/dist/es/index.js	3.67 kB
packages/simple-markdown/dist/es/index.js	12.5 kB

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