[Kernel] Move sgl-kernel under sglang.kernels.aot (#32648)

docs_new/docs/developer_guide/contribution_guide.mdx

@@ -164,7 +164,7 @@ Users listed in [CI_PERMISSIONS.json](https://github.com/sgl-project/sglang/blob
 
 ## How to update sgl-kernel
 Since sglang and the `sglang-kernel` (prior `sgl-kernel`) distribution are separate Python packages, our current GitHub CI infrastructure does not support updating a kernel and using it immediately within the same pull request (PR).
-To add a new kernel or modify an existing one in the `sgl-kernel/` source tree, you must use multiple PRs.
+To add a new kernel or modify an existing one in the `python/sglang/kernels/aot/` source tree, you must use multiple PRs.
 
 Follow these steps:
 

docs_new/docs/hardware-platforms/amd_gpu.mdx

@@ -50,11 +50,11 @@ cd sglang
 
 # Compile sgl-kernel
 pip install --upgrade pip
-cd sgl-kernel
+cd python/sglang/kernels/aot
 python setup_rocm.py install
 
 # Install sglang python package along with diffusion support
-cd ..
+cd ../../../..
 rm -rf python/pyproject.toml && mv python/pyproject_other.toml python/pyproject.toml
 pip install -e "python[all_hip]"
 ```

docs_new/docs/hardware-platforms/apple_metal.mdx

@@ -36,7 +36,7 @@ source sglang-metal/bin/activate
 
 # (Optional) Compile sgl-kernel
 uv pip install --upgrade pip
-uv run sgl-kernel/setup_metal.py install
+uv run python/sglang/kernels/aot/setup_metal.py install
 
 # Install sglang python package along with diffusion support
 rm -f python/pyproject.toml && mv python/pyproject_other.toml python/pyproject.toml

docs_new/docs/hardware-platforms/cpu_server.mdx

@@ -126,7 +126,7 @@ uv pip install --upgrade pip setuptools
 uv pip install .
 
 # Build the CPU backend kernels
-cd ../sgl-kernel
+cd sglang/kernels/aot
 cp pyproject_cpu.toml pyproject.toml
 uv pip install .
 ```

docs_new/docs/hardware-platforms/mthreads_gpu.mdx

@@ -19,11 +19,11 @@ cd sglang
 
 # Compile sgl-kernel
 pip install --upgrade pip
-cd sgl-kernel
+cd python/sglang/kernels/aot
 python setup_musa.py install
 
 # Install sglang python package along with diffusion support
-cd ..
+cd ../../../..
 rm -f python/pyproject.toml && mv python/pyproject_other.toml python/pyproject.toml
 pip install -e "python[all_musa]"
 ```