chore: config file support

Author: DemonKingSwarn

README.md

@@ -44,6 +44,7 @@
     7. [iSH Installation (IOS)](#7-ish-installation-ios)
 - [Dependencies](#dependencies)
 - [Usage](#usage)
+- [Configuration](#configuration)
 - [Support](#support)
 - [Provider](#provider)
 - [Project Disclaimer](#project-disclaimer)
@@ -143,6 +144,17 @@ Options:
     play        Stream your favourite movie by query.
 ```
 
+# Configuration
+
+- **Windows**: `%APPDATA%/flix-cli/flix-cli.conf`
+- **Linux/MacOS/FreeBSD**: `$HOME/.config/flix-cli/flix-cli.conf`
+
+example config file:
+
+```conf
+dl_dir="/home/swarn/dl"
+```
+
 # Support
 You can contact the developer directly via this <a href="mailto:swarn@demonkingswarn.ml">email</a>. However, the most recommended way is to head to the discord server.