📦 Created config files with common code

- Created common.nix for various configs
- Created theme.nix for theme related configs
- Moved some code to more logical files
- Moved some standalone files into nix multiline strings, in order to
  inject data

theme.nix

@@ -0,0 +1,41 @@
+rec {
+  theme = "catppuccin";
+  flavor = "mocha";
+
+  # TODO how to define font? JetBrainsMono | JetBrains Mono | JetBrainsMono Nerd Font | JetBrains Mono Nerd Font
+  nerdFont = "JetBrainsMono";
+
+  rosewaterAlpha = "f5e0dc";
+  flamingoAlpha = "f2cdcd";
+  pinkAlpha = "f5c2e7";
+  mauveAlpha = "cba6f7";
+  mauveRgb = "rgb(${mauveAlpha})";
+  redAlpha = "f38ba8";
+  redRgb = "rgb(${redAlpha})";
+  maroonAlpha = "eba0ac";
+  peachAlpha = "fab387";
+  yellowAlpha = "f9e2af";
+  yellowRgb = "rgb(${yellowAlpha})";
+  greenAlpha = "a6e3a1";
+  tealAlpha = "94e2d5";
+  tealRgb = "rgb(${tealAlpha})";
+  skyAlpha = "89dceb";
+  sapphireAlpha = "74c7ec";
+  blueAlpha = "89b4fa";
+  lavenderAlpha = "b4befe";
+  textAlpha = "cdd6f4";
+  textRgb = "rgb(${textAlpha})";
+  subtext1Alpha = "bac2de";
+  subtext0Alpha = "a6adc8";
+  overlay2Alpha = "9399b2";
+  overlay1Alpha = "7f849c";
+  overlay0Alpha = "6c7086";
+  surface2Alpha = "585b70";
+  surface1Alpha = "45475a";
+  surface0Alpha = "313244";
+  surface0Rgb = "rgb(${surface0Alpha})";
+  baseAlpha = "1e1e2e";
+  baseRgb = "rgb(${baseAlpha})";
+  mantleAlpha = "181825";
+  crustAlpha = "11111b";
+}