model: add Hakim and TookaSBERTV2 models

[mehran-sarmadi]

In this PR, we add five models: three from the Hakim family (hakim, hakim-small, and hakim-unsup), and two from the TookaSBERTV2 family (TookaSBERT-V2-Small and TookaSBERT-V2-Large).

• I have filled out the ModelMeta object to the extent possible
• I have ensured that my model can be loaded using
  • mteb.get_model(model_name, revision) and
  • mteb.get_model_meta(model_name, revision)
• I have tested the implementation works on a representative set of tasks.
• The model is public, i.e. is available either as an API or the wieght are publicly avaiable to download

[Samoed]

I think this is still a bit strange that order of id and instruction is changing

[mehran-sarmadi]

It looks like a display issue due to mixing Persian (RTL) and English (LTR). If you copy the code into VS Code, it should show correctly.

[Samoed]

Interesting bug