Keycallback of gui in WEB_RTC

[asd33015]

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Checklist

• [X] I have searched for similar issues.
• [X] For Python issues, I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for master branch).

Proposed new feature or change

May I ask when Web_rtc for GUI can add the function of keyboard control, just like the function of keycallback?

References

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Additional information

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