### What this PR does / why we need it?
This PR improves the readability of the documentation by fixing typos,
correcting command extensions, and fixing broken links in the Chinese
README.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Documentation changes only.
---------
Signed-off-by: sunshine202600 <sunshine202600@163.com>
### What this PR does / why we need it?
This PR adds a new document, `AGENTS.md`, which provides detailed
development guidelines for contributors to the vLLM Ascend project.
These guidelines cover code style, testing, NPU-specific considerations,
and the contribution process to ensure code quality and consistency.
### Does this PR introduce _any_ user-facing change?
No, this is a documentation-only update for developers.
### How was this patch tested?
This is a documentation change and does not require testing.
- vLLM version: v0.15.0
- vLLM main:
83b47f67b1
Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>
