[Docs] optimize and supplement docs system (#86)

Signed-off-by: Gaohan123 <gaohan19@huawei.com>

CONTRIBUTING.md

@@ -1,19 +1,3 @@
-# Contributing to vLLM
+# Contributing to vLLM-Omni
 
-## Getting Started
-
-Setup environment with uv
-```bash
-uv venv --python 3.12 --seed
-source .venv/bin/activate
-```
-
-Pre-commit has been linked to git commit. For run checks locally, please install pre-commit:
-```bash
-uv pip install pre-commit
-```
-
-Then run:
-```bash
-pre-commit run --show-diff-on-failure --color=always --all-files
-```
+You may find information about contributing to vLLM-Omni on [Contributing](docs/contributing/)