Add README

README.md

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+# Kakoune Qt
+
+Kakoune Qt is a Qt-based GUI for Kakoune written in C++.
+
+![screenshot](https://github.com/user-attachments/assets/8bdba0c8-3921-4b37-94a4-0a599819c58b)
+
+# Features
+
+- Create splits with `:kakqt-split-horizontal` and `:kakqt-split-vertical`
+
+- Focus splits with `:kakqt-focus <client_name>`
+
+- Show and hide clients with `:kakqt-show <client_name>` and `:kakqt-hide <client_name>`
+
+- Navigate between splits with keybindings `<c-h>`, `<c-j>`, `<c-k>` and `<c-l>`
+
+# Install from source
+
+1. Install the necessary build dependencies
+
+`sudo apt install -y git build-essentials cmake qt6-base-dev qt6-svg-dev`
+
+2. Clone the repository
+
+```sh
+git clone https://github.com/falbru/kakoune-qt ~/.config/kak/autoload/
+```
+
+3. Build the project
+
+```sh
+cd ~/.config/kak/autoload/kakoune-qt
+mkdir build
+cd build
+cmake -DCMAKE_BUILD_TYPE=Release ..
+make
+```
+
+You can then run the application with `./kak-qt`
+
+> NOTE: Make sure Kakoune is installed on your system!
+
+# Configuration
+
+Kakoune Qt is configured using the `ui_option` in Kakoune. The following options are implemented:
+
+- `kakqt_set_font <font_name>`: Set the font
+
+- `kakqt_set_color_<color_name> <rgb_value>`: Set the default colors (color_name can be: black, red, green, yellow, blue, magenta, cyan or white)
+
+Example configuration:
+
+`set global ui_options 'kakqt_set_font="Ubuntu Mono 12" kakqt_set_color_red="rgb:FF0000"'`