chore: set up Flutter and Android SDK with devbox

devbox.json

@@ -0,0 +1,32 @@
+{
+  "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/main/schema/schemas/devbox.schema.json",
+  "packages": {
+    "flutter@3.41.9-sdk-links": {},
+    "nixpkgs#openjdk17": {},
+    "path:./nix-android-sdk#android-sdk": {},
+    "gtk3": {},
+    "clang": {},
+    "cmake": {},
+    "ninja": {},
+    "pkg-config": {},
+    "patchelf": {}
+  },
+  "env": {
+    "ANDROID_HOME": "$DEVBOX_PACKAGES_DIR/share/android-sdk",
+    "ANDROID_SDK_ROOT": "$DEVBOX_PACKAGES_DIR/share/android-sdk"
+  },
+  "shell": {
+    "init_hook": [
+      "export PKG_CONFIG_PATH=\"$PWD/.devbox/nix/profile/default/lib/pkgconfig:$PKG_CONFIG_PATH\"",
+      "export LD_LIBRARY_PATH=\"$PWD/.devbox/nix/profile/default/lib:$LD_LIBRARY_PATH\"",
+      "flutter config --jdk-dir \"$(dirname \"$(dirname \"$(command -v java)\")\")\" > /dev/null"
+    ],
+    "scripts": {
+      "analyze": "flutter analyze",
+      "test": "flutter test",
+      "run": "flutter run",
+      "run-linux": "flutter run -d linux",
+      "build-linux": "flutter build linux"
+    }
+  }
+}