Adds README file with installation steps

README.md

@@ -0,0 +1,18 @@
+# Catppuccin for zsh
+
+## Installation
+``` sh
+git clone https://github.com/JannoTjarks/catppuccin-zsh.git
+mkdir ~/.oh-my-zsh/themes/catppuccin-flavors
+
+ln catppuccin-zsh/catppuccin.zsh-theme ~/.oh-my-zsh/themes/
+ln catppuccin-zsh/catppuccin-flavors/* ~/.oh-my-zsh/themes/catppuccin-flavors
+```
+
+## Setup
+Add the following lines to you zsh configuration:
+``` sh
+ZSH_THEME="catppuccin"
+CATPPUCCIN_FLAVOR="mocha" # Required! Options: mocha, flappe, macchiato, latte
+CATPPUCCIN_SHOW_TIME=true  # Optional! If set to true, this will add the current time to the prompt.
+```