Devbox env setup for Zed editor contribution

devbox.json

{
  "packages": [
    "rustup@latest",
    "libiconv@latest",
    "rustc-wasm32@latest",
    "wasmtime@latest",
    "cmake@latest"
  ],
  "shell": {
    "init_hook": [
      "projectDir=$(dirname $(readlink -f \"$0\"))",
      "rustupHomeDir=\"$projectDir\"/.rustup",
      "mkdir -p $rustupHomeDir",
      "export RUSTUP_HOME=$rustupHomeDir",
      "export LIBRARY_PATH=$LIBRARY_PATH:\"/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib\"",
      "export CPATH=$CPATH:\"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include\"",
      "export CXX=\"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++\"",
      "export CPLUS_INCLUDE_PATH=\"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1\"",
      "export DEVELOPER_DIR=\"/Applications/Xcode.app/Contents/Developer\"",
      "export SDKROOT=\"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk\"",
      "export TOOLCHAINS=\"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain\"",
      "rustup default stable",
      "cargo fetch"
    ],
    "scripts": {
      "test":       "cargo test -- --show-output",
      "start":      "cargo run",
      "build-docs": "cargo doc"
    }
  }
}