[Feat]: Provide a Friendly Method for mobile: launchApp Execution

[Dor-bl]

Background

Currently, Appium’s XCUITest driver provides the mobile: launchApp execution method to start an app with processArguments and environment variables. However, the Appium .NET Client does not offer a dedicated, user-friendly method to invoke this extension.

Problem

Developers using the .NET client must manually execute mobile: launchApp via driver.ExecuteScript(), which is less intuitive and requires additional boilerplate code.
Unlike the existing LaunchApp() and RestartApp() methods, there is no high-level method that directly supports passing processArguments and environment variables.

Proposed Solution

Introduce a new method in the .NET client, such as:

public void LaunchAppWithArguments(string bundleId, Dictionary<string, object> processArguments = null, Dictionary<string, string> environmentVariables = null)
This method should:

Internal call mobile: launchApp with the provided arguments.
It allows specifying processArguments and environment variables in a structured manner.
Ensure consistency with other Appium client implementations.

Benefits

Provides a clean, structured API for launching apps with specific configurations.
Reduces the need for raw script execution (driver.ExecuteScript()).
Aligns the .NET client with the Appium XCUITest driver’s intended usage.

Reference

Original discussion: #858