[NPU][LLM] add README & reformat llama scripts

[SylarTiaNII]

PR types

Others

PR changes

Others

Description

add README for llama training/inference on NPU(910)

[paddle-bot[bot]]

Thanks for your contribution!

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 55.81%. Comparing base (65e721e) to head (5419849).

:exclamation: Current head 5419849 differs from pull request most recent head 7ab4a98

Please upload reports for the commit 7ab4a98 to get more accurate results.

Files	Patch %	Lines
paddlenlp/transformers/mc2_parallel_linear.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #8642 +/- ## =========================================== + Coverage 55.80% 55.81% +0.01% =========================================== Files 620 620 Lines 96642 96599 -43 =========================================== - Hits 53928 53917 -11 + Misses 42714 42682 -32 ```

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[onecatcn]

LGTM

[ronny1996]

https://github.com/PaddlePaddle/PaddleNLP/blob/develop/llm/predict/export_model.py#L104 这里帮忙改成

from npu.llama.export_utils import process_params