[FIX] Fix XrInputSource JSDoc errors and redundant code

[willeastcott]

Summary

• Fix JSDoc typo: "removed to the the" → "removed from the"
• Fix incorrect event name in example: 'remove' → 'hittest:remove'
• Fix @returns descriptions for getLocalPosition() and getLocalRotation() to correctly say "local space" instead of "world space"
• Use existing parent variable instead of redundant this._manager.camera.parent access

Checklist

• I have read the contributing guidelines
• My code follows the project's coding standards
• This PR focuses on a single change

[Copilot]

Pull request overview

This PR fixes multiple JSDoc documentation errors and removes redundant code in the XrInputSource class. The changes improve documentation accuracy and code clarity without affecting functionality.

Changes:

• Fixed JSDoc grammar and typo in event documentation
• Corrected event name in code example to match actual event constant
• Fixed incorrect JSDoc return descriptions for local space methods
• Eliminated redundant property access by reusing existing variable

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