Request for tutorial: Interfacing DeePTB with TBoptc for finite-temperature optical spectra

### Describe Current Status and Possible Solution

Hi everyone,

Could you please provide an official tutorial or example workflow demonstrating how to use 'TBoptc' in combination with the `DeePTB` interface?

I am trying to replicate the methodology outlined in your paper "Deep neural network for phonon-assisted optical spectra of semiconductors at finite temperatures". Having a clear guide on how to pipe the predicted Hamiltonians into the optical property calculators to perform the Williams-Lax ensemble averaging would be incredibly helpful for the community.

Thank you for your excellent work!

### Additional Context

_No response_

No repository file, test, or entry point is named. Start by reading the DeePTB interface and the cited paper alongside TBoptc's workflow; done means an official example that explains passing predicted Hamiltonians to the optical calculators and performing Williams-Lax finite-temperature averaging.

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