docs: Add instructions to install llama.cpp from conda-forge (#22219)

* docs: Add instructions to install `llama.cpp` from conda-forge

Signed-off-by: Julien Jerphanion <git@jjerphan.xyz>

* Rewording of instructions

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

---------

Signed-off-by: Julien Jerphanion <git@jjerphan.xyz>
Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

README.md

@@ -37,7 +37,7 @@ LLM inference in C/C++
 
 Getting started with llama.cpp is straightforward. Here are several ways to install it on your machine:
 
-- Install `llama.cpp` using [brew, nix or winget](docs/install.md)
+- Install `llama.cpp` using [brew, nix, winget, or conda-forge](docs/install.md)
 - Run with Docker - see our [Docker documentation](docs/docker.md)
 - Download pre-built binaries from the [releases page](https://github.com/ggml-org/llama.cpp/releases)
 - Build from source by cloning this repository - check out [our build guide](docs/build.md)

docs/install.md

@@ -1,12 +1,40 @@
 # Install pre-built version of llama.cpp
 
 | Install via | Windows | Mac  | Linux |
-|-------------|---------|-----|-------|
+|-------------|---------|------|-------|
+| conda-forge | ✅      | ✅   | ✅   |
 | Winget      | ✅      |      |      |
 | Homebrew    |         | ✅   | ✅   |
 | MacPorts    |         | ✅   |      |
 | Nix         |         | ✅   | ✅   |
 
+## conda-forge (Windows, Mac and Linux)
+
+conda-forge provides builds for:
+ - CUDA (Windows and Linux)
+ - Vulkan (Windows and Linux)
+ - Apple Metal (macOS)
+
+```sh
+conda install -c conda-forge llama-cpp
+```
+
+```sh
+mamba install -c conda-forge llama-cpp
+```
+
+```sh
+# Project-local installation
+pixi add llama-cpp
+
+# Global installation
+pixi global install llama-cpp
+```
+
+This distribution is managed on [`conda-forge/llama-cpp-feedstock`](https://github.com/conda-forge/llama.cpp-feedstock/).
+
+Shall you have any problems, please open an issue on [its issue tracker](https://github.com/conda-forge/llama.cpp-feedstock/issues).
+
 ## Winget (Windows)
 
 ```sh