add minimum security for otbr web site

[Golem1373]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Described the feature in detail and justified the reason for the request.
• Provided specific use cases and examples.

Feature description

add basic credentials to connect otbr web site , do not allow to compile with default password, allow go in web site with credential with wget should be a good way to test

Use cases

for basic security

Alternatives

No response

Additional context

No response

[chshu]

Regarding the otbr website, are you referring to the following example in this repository:
https://github.com/espressif/esp-thread-br/tree/main/components/esp_ot_br_server

It is provided for reference only. Please feel free to implement login functionality in your own product, and contributions are welcome.