Add Dart ffi README

Author: spacebear21

payjoin-ffi/README.md

@@ -13,6 +13,7 @@ The directories below include instructions for using, building, and publishing t
 | Language | Platform              | Repository | Published Package | 
 |----------|-----------------------|-------------------|------------------------------------|
 | Python   | linux, macOS          | [payjoin-ffi/python](python) | [payjoin](https://pypi.org/project/payjoin/) |
+| Dart     | linux, macOS          | [payjoin-ffi/dart](dart)     | N/A |
 
 ## Minimum Supported Rust Version (MSRV)
 

payjoin-ffi/dart/README.md

@@ -0,0 +1,24 @@
+# Payjoin Dart Bindings
+
+Welcome to the Dart language bindings for the [Payjoin Dev Kit](https://payjoindevkit.org/)!
+
+## Running Tests
+
+Follow these steps to clone the repository and run the tests.
+
+
+```shell
+git clone https://github.com/payjoin/rust-payjoin.git
+cd rust-payjoin/payjoin-ffi/dart
+
+# Install dependencies
+dart pub get
+
+# Generate the bindings (use the script appropriate for your platform)
+bash ./scripts/generate_<platform>.sh
+
+# Run all tests
+dart test
+```
+
+Note that you'll need Docker to run the integration tests. If you get a "Failed to start container" error, ensure the Docker engine is running on your machine.