Common/programs/starship: add catpuccin color palette

roles/common/programs/starship.nix

@@ -1,7 +1,16 @@
-{ config, ... }:
-
+{ pkgs, ... }:
+let
+	catppuccinFlavour = "mocha";
+	catppuccinStarship = pkgs.fetchFromGitHub {
+		owner = "catppuccin";
+		repo = "starship";
+		# Latest commit is 5629d2356f62a9f2f8efad3ff37476c19969bd4f
+		rev = "main";
+		hash = "sha256-nsRuxQFKbQkyEI4TXgvAjcroVdG+heKX5Pauq/4Ota0=";
+	} + /palettes/${catppuccinFlavour}.toml;
+in
 {
-	programs.starship = {
+	programs.starship = with builtins; {
 		enable = true;
 		settings = {
 			nix_shell = {
@@ -17,6 +26,9 @@
 				disabled = false;
 				read_only = " 󰌾";
 			};
-		};
+			palette = "catppuccin_${catppuccinFlavour}";
+		} //
+		# Add the catppuccin palette to the settings file
+		(fromTOML (readFile catppuccinStarship));
 	};
 }