move libcamera stuff into a separate overlay

overlays/libcamera-apps.nix

@@ -0,0 +1,43 @@
+{ libcamera-apps-src
+, lib
+, stdenv
+, fetchFromGitHub
+, fetchpatch
+, meson
+, pkg-config
+, libjpeg
+, libtiff
+, libpng
+, libcamera
+, libepoxy
+, boost
+, libexif
+, ninja
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libcamera-apps";
+  version = "v1.4.1";
+
+  src = libcamera-apps-src;
+
+  nativeBuildInputs = [ meson pkg-config ];
+  buildInputs = [ libjpeg libtiff libcamera libepoxy boost libexif libpng ninja ];
+  mesonFlags = [
+    "-Denable_qt=false"
+    "-Denable_opencv=false"
+    "-Denable_tflite=false"
+    "-Denable_drm=true"
+  ];
+  # Meson is no longer able to pick up Boost automatically.
+  # https://github.com/NixOS/nixpkgs/issues/86131
+  BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
+  BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
+
+  meta = with lib; {
+    description = "Userland tools interfacing with Raspberry Pi cameras";
+    homepage = "https://github.com/raspberrypi/libcamera-apps";
+    license = licenses.bsd2;
+    platforms = [ "aarch64-linux" ];
+  };
+}