docs: add fancy-bar docs

Author: imiric

README.md

@@ -37,6 +37,10 @@ spawn-at-startup "quickshell" "--config" "niri-simple-bar"
 
   ![Simple bar](/simple-bar/screenshot.png)
 
+- [Fancy bar](/fancy-bar)
+
+  ![Fancy bar](/fancy-bar/screenshot.png)
+
 
 ## License
 

fancy-bar/README.md

@@ -0,0 +1,27 @@
+## Fancy bar
+
+![Fancy bar](./screenshot.png)
+
+A more advanced variant of the [Simple bar](../simple-bar).
+
+> [!WARNING]
+> This configuration is a work in progress, and might change at any point.
+
+### Features
+
+- Configurable via a [JSON file](./config.json). See
+  [`Config.qml`](./modules/common/Config.qml) for possible configuration options.
+- Battery widget with percentage and animated charging indicator, supporting vertical and
+  horizontal orientations.
+- Focused window title and icon.
+- Stacked time and date widget.
+- Supports top and bottom positioning.
+- Relative scaling of most elements.
+- A soft shadow underneath the bar.
+
+
+### Dependencies
+
+- Battery widget: [UPower](https://upower.freedesktop.org/)
+
+- Fonts: [Barlow](https://tribby.com/fonts/barlow/), [Noto Sans](https://notofonts.github.io/)