[Feature] Onekey Tag Dotmap Converter

**Describe the solution you'd like**
Onekey tag should have a convenient way to convert from dotmap.

**Describe alternatives you've considered**
A user-friendly interface should be integrated into the application. Specifically, there should be a single screen that prompts the user to input their dotmap and converts it into a mnemonic. This should not require the user to search for information independently.

**Additional context**

Prototype:


Example:
https://github.com/Umiiii/onekey-keytag-converter

https://onekey-keytag-converter.vercel.app/

No file or test entry point is named. Start by reviewing the app's existing tag and mnemonic flows, then compare the requested single-screen interaction with the linked prototype and example. Done means the app provides the described dotmap-to-mnemonic conversion screen.

Written by the indexing model from the issue text.