add installation guide

Author: leofang

cuda_core/docs/source/install.md

@@ -12,6 +12,16 @@ dependencies are as follows:
 
 [^1]: Including `cuda-python`.
 
+## Installing from PyPI
+
+`cuda.core` works with `cuda.bindings` (part of `cuda-python`) 11 or 12. For example with CUDA 12:
+```console
+$ pip install cuda-core[cu12]
+```
+and likewise use `[cu11]` for CUDA 11.
+
+Note that using `cuda.core` with NVRTC or nvJitLink installed from PyPI via `pip install` is currently
+not supported. This will be fixed in a future release.
 
 ## Installing from Source
 

cuda_core/docs/source/release/0.1.1-notes.md

@@ -17,6 +17,8 @@ Released on Dec XX, 2024
 
 - All APIs are currently *experimental* and subject to change without deprecation notice.
   Please kindly share your feedbacks with us so that we can make `cuda.core` better!
+- Using `cuda.core` with NVRTC or nvJitLink installed from PyPI via `pip install` is currently
+  not supported. This will be fixed in a future release.
 - Some `LinkerOptions` are only available when using a modern version of CUDA. When using CUDA <12,
   the backend is the cuLink api which supports only a subset of the options that nvjitlink does.
   Further, some options aren't available on CUDA versions <12.6