Update README and flake.nix

README: inform users about breaking changes (due to the font change)
flake: attempt to install the bootstrap-icons font

flake.nix

@@ -1,16 +1,13 @@
 {
   description = "Noctalia shell - a Wayland desktop shell built with Quickshell";
-
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     systems.url = "github:nix-systems/default";
-
     quickshell = {
       url = "git+https://git.outfoxxed.me/outfoxxed/quickshell";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
-
   outputs = {
     self,
     nixpkgs,
@@ -24,7 +21,6 @@
       system:
         nixpkgs.legacyPackages.${system}.alejandra
     );
-
     packages = eachSystem (
       system: let
         pkgs = nixpkgs.legacyPackages.${system};
@@ -32,7 +28,33 @@
           withX11 = false;
           withI3 = false;
         };
-
+        
+        # Custom ttf-bootstrap-icons package
+        ttf-bootstrap-icons = pkgs.stdenvNoCC.mkDerivation rec {
+          pname = "ttf-bootstrap-icons";
+          version = "1.13.1";
+          
+          src = pkgs.fetchzip {
+            url = "https://github.com/twbs/icons/releases/download/v${version}/bootstrap-icons-${version}.zip";
+            sha256 = "999021e12fab5c9ede5e4e7072eb176122be798b2f99195acf5dda47aef8fc93";
+            stripRoot = false;
+          };
+          
+          installPhase = ''
+            runHook preInstall
+            install -Dm644 fonts/bootstrap-icons.ttf $out/share/fonts/truetype/bootstrap-icons.ttf
+            runHook postInstall
+          '';
+          
+          meta = with pkgs.lib; {
+            description = "Official open source SVG icon library for Bootstrap";
+            homepage = "https://icons.getbootstrap.com/";
+            license = licenses.mit;
+            platforms = platforms.all;
+            maintainers = [];
+          };
+        };
+        
         runtimeDeps = with pkgs; [
           bash
           bluez
@@ -49,12 +71,12 @@
           networkmanager
           wl-clipboard
         ];
-
         fontconfig = pkgs.makeFontsConf {
           fontDirectories = [
             pkgs.material-symbols
             pkgs.roboto
             pkgs.inter-nerdfont
+            ttf-bootstrap-icons  # Add the custom font package here
           ];
         };
       in {
@@ -62,21 +84,17 @@
           pname = "noctalia-shell";
           version = self.rev or self.dirtyRev or "dirty";
           src = ./.;
-
           nativeBuildInputs = [pkgs.gcc pkgs.makeWrapper pkgs.qt6.wrapQtAppsHook];
           buildInputs = [qs pkgs.xkeyboard-config pkgs.qt6.qtbase];
           propagatedBuildInputs = runtimeDeps;
-
           installPhase = ''
             mkdir -p $out/share/noctalia-shell
             cp -r ./* $out/share/noctalia-shell
-
             makeWrapper ${qs}/bin/qs $out/bin/noctalia-shell \
               --prefix PATH : "${pkgs.lib.makeBinPath runtimeDeps}" \
               --set FONTCONFIG_FILE "${fontconfig}" \
               --add-flags "-p $out/share/noctalia-shell"
           '';
-
           meta = {
             description = "A sleek and minimal desktop shell thoughtfully crafted for Wayland, built with Quickshell.";
             homepage = "https://github.com/noctalia-dev/noctalia-shell";
@@ -84,9 +102,11 @@
             mainProgram = "noctalia-shell";
           };
         };
+        
+        # Expose the custom font as a separate package (optional)
+        ttf-bootstrap-icons = ttf-bootstrap-icons;
       }
     );
-
     defaultPackage = eachSystem (system: self.packages.${system}.default);
   };
-}
+}