doc: installation instructions for Solus (#4352)

README.md

@@ -51,6 +51,7 @@
 - [Translation](#translation)
 - [Download](#download)
   - [Arch Linux](#arch-linux)
+  - [Solus](#solus)
   - [MacOS](#macos)
   - [Windows](#windows)
     - [How to install without a network connection? (in Windows)](#how-to-install-without-a-network-connection-in-windows)
@@ -84,6 +85,12 @@ latest version.
 Install the [`pear-desktop`](https://aur.archlinux.org/packages/pear-desktop) package from the AUR. For AUR installation instructions, take a look at
 this [wiki page](https://wiki.archlinux.org/index.php/Arch_User_Repository#Installing_packages).
 
+### [Solus](https://getsol.us/)
+
+```bash
+sudo eopkg install pear-desktop
+```
+
 ### macOS
 
 You can install the app using Homebrew (see the [cask definition](https://github.com/pear-devs/homebrew-pear)):