fix(a11y): Add aria-label to clipboard copy button

[huangkevin-apr]

Closes #2185

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

Added aria-label="Copy to clipboard" to the clipboard copy button and marked the decorative SVG icon as aria-hidden="true" to fix accessibility violation 2. This ensures screen reader users can properly identify and interact with the copy button.

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Screenshots

Fix Before:
IBM Equal Access Accessibility Checker showing violation 2 - "/document[1] /main[1] /button[1]"

Form control element <button> has no associated label
The SVG element has no accessible name

Fix After:
Accessibility violation resolved - button now has proper accessible label. Have resolved 2 (8-6) violations.

💯

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