feat: Add drag-and-drop functionality

[Alpaca00]

Hi, there)

This merge includes the implementation of the drag-and-drop functionality, which enhances the testing capabilities of Flutter application.

We make requests to the driver by leveraging the CommandExtension class.

How it works is described in this file: example/dart/README.md

I also created a mobile application project for testing with the corresponding type of widget that this functionality can interact with and added it to the documentation.
https://github.com/Alpaca00/command-driven-list

I saw several issues related to this functionality

• Drag n Drop functionality needs to be added in Flutter_Driver flutter/flutter#39639
• Driver not support custom command of flutter driver #688

My dependencies:

• node: v18.19.1
• npm: 9.2.0
• appium: 2.12.1
• Listing available drivers:
  i. uiautomator2@3.8.1 [installed (npm)]
  ii. flutter@2.9.2 [installed (npm)] (local)
  test
• os: Ubuntu 24.04.1 LTS
• dart sdk: 3.5.4
• flutter 3.24.4
• java: JDK 18
• python 3.12.3

I'm not sure, but it seems that these changes do not affect any other functionalities.
It works for me locally.

logs:

app:

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Alpaca00 / name: Oleg Matskiv (48ff33b, 55dd3e1, b6c687b, b34e23c)
• ✅ login: KazuCocoa / name: Kazuaki Matsuo (cd9a689)

[KazuCocoa]

Thank you! lg.

I'll merge and release a new version later.

[KazuCocoa]

v2.10.0 has this PR

[jlipps]

Hi @Alpaca00, congrats: the Appium project wants to compensate you for this contribution! Please reply to this comment mentioning @jlipps and @KazuCocoa and sharing your OpenCollective account name, so that we can initiate payment! Or let us know if you decline to receive compensation via OpenCollective. Thank you!

[Alpaca00]

Hi @Alpaca00, congrats: the Appium project wants to compensate you for this contribution! Please reply to this comment mentioning @jlipps and @KazuCocoa and sharing your OpenCollective account name, so that we can initiate payment! Or let us know if you decline to receive compensation via OpenCollective. Thank you!

Hi @jlipps and @KazuCocoa , thanks so much for this!

My Open Collective account:

• https://opencollective.com/oleg-matskiv

Let me know if there’s anything else you need.