[WIP] Add support for Unicode characters in node name

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Is it possible to support Unicode characters in node name</issue_title>
<issue_description>Is your feature request related to a problem? Please describe.
When I create a new node and enter Chinese characters in the Name input box, I get an error message: "Invalid model name: use only letters, digits and underscores."

Describe the solution you'd like
Chinese characters are accepted as mode Name.

Describe alternatives you've considered
None.

Additional context
None.
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Is it possible to support Unicode characters in node name #59

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