Merge #6018

6018: Add instructions for Rust on Linux/macOS r=edg-l a=def-

<!-- What is the motivation for the changes of this pull request? -->

<!-- Note that builds and other checks will be run for your change. Don't feel intimidated by failures in some of the checks. If you can't resolve them yourself, experienced devs can also resolve them before merging your pull request. -->

## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: def <dennis@felsin9.de>

README.md

@@ -35,29 +35,29 @@ Dependencies on Linux / macOS
 
 You can install the required libraries on your system, `touch CMakeLists.txt` and CMake will use the system-wide libraries by default. You can install all required dependencies and CMake on Debian or Ubuntu like this:
 
-    sudo apt install build-essential cmake git glslang-tools google-mock libavcodec-extra libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libcurl4-openssl-dev libfreetype6-dev libglew-dev libnotify-dev libogg-dev libopus-dev libopusfile-dev libpng-dev libsdl2-dev libsqlite3-dev libssl-dev libvulkan-dev libwavpack-dev libx264-dev python spirv-tools
+    sudo apt install build-essential cargo cmake git glslang-tools google-mock libavcodec-extra libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libcurl4-openssl-dev libfreetype6-dev libglew-dev libnotify-dev libogg-dev libopus-dev libopusfile-dev libpng-dev libsdl2-dev libsqlite3-dev libssl-dev libvulkan-dev libwavpack-dev libx264-dev python rustc spirv-tools
 
 On older distributions like Ubuntu 18.04 don't install `google-mock`, but instead set `-DDOWNLOAD_GTEST=ON` when building to get a more recent gtest/gmock version.
 
 Or on CentOS, RedHat and AlmaLinux like this:
 
-    sudo yum install cmake ffmpeg-devel freetype-devel gcc gcc-c++ git glew-devel glslang gmock-devel gtest-devel libcurl-devel libnotify-devel libogg-devel libpng-devel libx264-devel make openssl-devel opus-devel opusfile-devel python2 SDL2-devel spirv-tools sqlite-devel vulkan-devel wavpack-devel
+    sudo yum install cargo cmake ffmpeg-devel freetype-devel gcc gcc-c++ git glew-devel glslang gmock-devel gtest-devel libcurl-devel libnotify-devel libogg-devel libpng-devel libx264-devel make openssl-devel opus-devel opusfile-devel python2 rust SDL2-devel spirv-tools sqlite-devel vulkan-devel wavpack-devel
- 
+
-Or on Fedora like this:  
+Or on Fedora like this:
 
     sudo dnf install cmake ffmpeg-devel freetype-devel gcc gcc-c++ git glew-devel glslang gmock-devel gtest-devel libcurl-devel libnotify-devel libogg-devel libpng-devel make openssl-devel opus-devel opusfile-devel python2 SDL2-devel spirv-tools sqlite-devel vulkan-devel wavpack-devel x264-devel
-    
+
 Or on Arch Linux like this:
 
-    sudo pacman -S --needed base-devel cmake curl ffmpeg freetype2 git glew glslang gmock libnotify libpng opusfile python sdl2 spirv-tools sqlite vulkan-headers vulkan-icd-loader wavpack x264
+    sudo pacman -S --needed base-devel cargo cmake curl ffmpeg freetype2 git glew glslang gmock libnotify libpng opusfile python rust sdl2 spirv-tools sqlite vulkan-headers vulkan-icd-loader wavpack x264
 
 Or on Gentoo like this:
 
-    emerge --ask dev-db/sqlite dev-libs/glib dev-libs/openssl dev-util/glslang dev-util/spirv-headers dev-util/spirv-tools media-libs/freetype media-libs/glew media-libs/libglvnd media-libs/libogg media-libs/libpng media-libs/libsdl2 media-libs/libsdl2[vulkan] media-libs/opus media-libs/opusfile media-libs/pnglite media-libs/vulkan-loader[layers] media-sound/wavpack media-video/ffmpeg net-misc/curl x11-libs/gdk-pixbuf x11-libs/libnotify
+    emerge --ask dev-db/sqlite dev-lang/rust-bin dev-libs/glib dev-libs/openssl dev-util/glslang dev-util/spirv-headers dev-util/spirv-tools media-libs/freetype media-libs/glew media-libs/libglvnd media-libs/libogg media-libs/libpng media-libs/libsdl2 media-libs/libsdl2[vulkan] media-libs/opus media-libs/opusfile media-libs/pnglite media-libs/vulkan-loader[layers] media-sound/wavpack media-video/ffmpeg net-misc/curl x11-libs/gdk-pixbuf x11-libs/libnotify
-    
+
 On macOS you can use [homebrew](https://brew.sh/) to install build dependencies like this:
 
-    brew install cmake ffmpeg freetype glew glslang googletest libpng molten-vk opusfile SDL2 spirv-tools vulkan-headers wavpack x264
+    brew install cmake ffmpeg freetype glew glslang googletest libpng molten-vk opusfile rust SDL2 spirv-tools vulkan-headers wavpack x264
 
 If you don't want to use the system libraries, you can pass the `-DPREFER_BUNDLED_LIBS=ON` parameter to cmake.
 
@@ -149,7 +149,7 @@ sudo apt install libgtest-dev
 cd /usr/src/gtest
 sudo cmake CMakeLists.txt
 sudo make -j8
- 
+
 # copy or symlink libgtest.a and libgtest_main.a to your /usr/lib folder
 sudo cp lib/*.a /usr/lib
 ```