feat: add theme readme

modules/nixos/theming/README.md

@@ -0,0 +1,85 @@
+# MD3 Evo Theming
+
+MD3 Evo is a theming system derived from the Material Design 3 color sytem.
+
+## Features
+
+- Wallpaper colors
+- Dynamic color and dark mode switching at runtime (no `nixos-rebuild`)
+- Dark and light mode support
+- User contrast options
+- Color flavours
+- Faithful ANSI colors that still adapt to your theme
+- Static syntax highlighting colors that blends with your theme
+- Customizable syntax highlighting tokens
+- Transparency and blur support
+
+## CLI Usage
+
+```sh
+# Open wallpaper picker
+theme wallpaper
+# Set wallpaper by path
+theme wallpaper ~/Pictures/wallpaper.png
+# Switch theme
+theme toggle
+theme light
+theme dark
+# Get current theme
+theme mode
+```
+
+## Integrations
+
+| Name     | Status | Comment                                                                         |
+| -------- | ------ | ------------------------------------------------------------------------------- |
+| Neovim   | ✅     |                                                                                 |
+| Hyprland | ✅     |                                                                                 |
+| Kitty    | ✅     | Missing some parts I don't use. Transparency is tinted weirdly for some reason. |
+| Anyrun   | ✅     |                                                                                 |
+| Vesktop  | 🚧     | Contrast is weird in some places                                                |
+| GTK3     | 🚧     |                                                                                 |
+| GTK4     | 🚧     | Runtime switching is unreliable                                                 |
+
+## NixOS/Home Manager Module
+
+```nix
+# Default options
+theming.md3-evo = {
+  enable = false;
+  flavour = "tonal-spot";
+  contrast = 0;
+  transparency = 0.8;
+  radius = 24;
+  padding = 12;
+  blur = 16;
+  semantic = {
+    blend = false;
+    danger = "#ff0000";
+    warning = "#ffff00";
+    success = "#00ff00";
+    info = "#0000ff";
+  };
+  syntax = {
+    blend = true;
+    keywords = "#ff8000";
+    functions = "#0000ff";
+    properties = "#ff00ff";
+    constants = "#ff00ff";
+    strings = "#00ff00";
+    numbers = "#00ffff";
+    structures = "#ffff00";
+    types = "#00ffff";
+  };
+  ansi = {
+    blend = true;
+    red = "#ff0000";
+    green = "#00ff00";
+    yellow = "#ffff00";
+    orange = "#ff8000";
+    blue = "#0000ff";
+    magenta = "#ff00ff";
+    cyan = "#00ffff";
+  };
+};
+```