Cwh/add fp8 doc

[HIT-cwh]

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[Copilot]

Pull Request Overview

This PR adds FP8 (8-bit floating point) training documentation to XTuner. The changes include fixing function call parameters in FP8 modules and adding comprehensive Chinese documentation about FP8 training capabilities.

Key changes:

• Fix function call parameters by using positional arguments instead of keyword arguments
• Add comprehensive FP8 training documentation in Chinese
• Include tutorial links and navigation updates

Reviewed Changes

Copilot reviewed 5 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
xtuner/v1/float8/float8_linear_tile_wise.py	Remove keyword argument group_size in function call
xtuner/v1/float8/float8_gmm_tile_wise.py	Remove keyword argument group_size and add input shape handling
docs/zh_cn/pretrain_sft/tutorial/llm_trainer.md	Add reference labels for cross-linking
docs/zh_cn/pretrain_sft/advanced_tutorial/index.rst	Add FP8 documentation to table of contents
docs/zh_cn/pretrain_sft/advanced_tutorial/float8.md	Add comprehensive FP8 training documentation

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