added README with installation instructions

README.md

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+# desktop-icon
+
+> Show Files from a Directory on the Desktop
+
+## Features
+
+- [X] Show content from a folder as Icons on the Desktop
+- [X] Use xdg_user_dir to use the default desktop directory
+- [X] Start default application for the active file
+- [X] Update the Icons on changes to the directory (added/removed files)
+- [ ] Dropping files on the Desktop
+- [ ] Dragging files from the Desktop
+- [ ] Multi-Monitor Support
+- [ ] Thumbnails for Images/Documents
+- [ ] Sort Rows of List Store based on Name/Type/Date
+- [ ] Context-Menu for creating files
+
+## Supported Desktops
+
+> Quoted from [gtk-layer-shell](https://github.com/wmww/gtk-layer-shell)
+
+This application only works on Wayland, and only on Wayland compositors that
+support the Layer Shell protocol. Layer shell **is supported** on:
+- wlroots based compositors (such as **Sway**)
+- Mir-based compositors (some may not enable the protocol by default and require
+  `--add-wayland-extension zwlr_layer_shell_v1`)
+
+Layer shell **is not supported** on:
+- Gnome-on-Wayland
+- Any X11 desktop
+
+## Getting Started
+
+### Dependencies
+
+- gtk+-3.0
+- gtk-layer-shell
+
+Arch
+```sh
+sudo pacman -S gtk3 gtk-layer-shell
+```
+
+### Installing
+
+```sh
+git clone https://github.com/Geronymos/desktop-icons
+cd desktop-icons
+make
+sudo make install
+```
+
+Uninstall
+```sh
+sudo make uninstall
+```
+
+### Development
+
+Dependencies
+- bear
+
+To have warnings and autocompletion with clangd in Vim you can generate the
+`compile-commands.json` with
+```sh
+make clangd
+```
+
+## License
+
+This project is licensed under the GPL-3 License - see the `LICENSE` file for details
+