Flutter Setup

We have set up instructions for Linux, MacOS, and Windows.
Flutter version 3.10.1 is the version that AppFlowy is built and tested on. If you installed Flutter before, make sure the version matches AppFlowy's. And don't forget to run the following command to active the protoc plugin.
dart pub global activate protoc_plugin 20.0.1
Rust version updates regularly (currently 1.70+). If you have installed Rust before, make sure the stable version matches AppFlowy's (see RUST_TOOLCHAIN in .github/workflows).