feat(model,eval) DPO training & human preference eval

[BobbyL2k]

Why this PR

This PR adds DPO training scripts and human preference evaluation notebook to repo

Changes

Added DPO training scripts and human preference evaluation notebook

Related Issues

Close #

Checklist

• [X] PR should be in the Naming convention
• [ ] Assign yourself in to Assigneees
• [ ] Tag related issues
• [ ] Constants name should be ALL_CAPITAL, function name should be snake_case, and class name should be CamelCase
• [ ] complex function/algorithm should have Docstring
• [ ] 1 PR should not have more than 200 lines changes (Exception for test files). If more than that please open multiple PRs
• [X] At least PR reviewer must come from the task's team (model, eval, data)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (5fbee96) 64.16% compared to head (54425cb) 19.39%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #338 +/- ## =========================================== - Coverage 64.16% 19.39% -44.78% =========================================== Files 11 25 +14 Lines 427 1392 +965 =========================================== - Hits 274 270 -4 - Misses 153 1122 +969 ``` | [Flag](https://app.codecov.io/gh/OpenThaiGPT/openthaigpt-pretraining/pull/338/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenThaiGPT) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/OpenThaiGPT/openthaigpt-pretraining/pull/338/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenThaiGPT) | `19.39% <ø> (-44.78%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenThaiGPT#carryforward-flags-in-the-pull-request-comment) to find out more.

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