Unity client sdk

[Fellmonkey]

What does this PR do?

This PR adds comprehensive Unity SDK support to the SDK generator by:

1. Unity Language Implementation: Introduces a new Unity language class (src/SDK/Language/Unity.php) that extends the base Language class, providing Unity-specific type mappings, keywords, and code generation logic for C# in Unity environment.

2. Unity Template System: Adds a complete set of Unity-specific templates under templates/unity/Assets/ including:

   • Runtime components (Client, Services, Models, Enums, etc.)
   • Editor tools (Setup Assistant, Setup Window)
   • Unity project files (assembly definitions, project settings)
   • Required .NET libraries for Unity compatibility

3. Automated Testing Integration: Introduces Unity2021 test support with:

   • Unity2021Test.php test class that integrates with the existing test framework
   • Unity test source files (Tests.cs, Tests.asmdef) for comprehensive SDK testing
   • Docker-based Unity CI testing using unityci/editor:ubuntu-2021.3.45f1-base-3.1.0

4. CI/CD Integration: Updates the GitHub Actions workflow to:

   • Include Unity2021 in the test matrix alongside other SDK platforms
   • Set up the UNITY_LICENSE environment variable for Unity Editor automation
   • Enable automated testing of the Unity SDK in the CI pipeline

5. Unity Project Structure: Implements proper Unity package structure with:

   • Assets organized under Assets/Runtime/ and Assets/Editor/
   • Required Unity project settings and manifest files

Test Plan

The testing strategy includes:

1. Unit Testing: The Unity2021Test.php runs comprehensive tests covering:

   • HTTP operations (GET, POST, PUT, PATCH, DELETE)
   • File upload functionality with different file types
   • Error handling and exception management
   • OAuth2 authentication flow
   • Query helper methods
   • Permission and role management
   • ID generation utilities

2. Docker-based CI Testing: Tests run in a controlled Unity environment using:

   • Unity Editor 2021.3.45f1 in headless mode
   • Automated license activation using secrets
   • PlayMode test execution with filtered output
   • Integration with the existing mock API server

Related PRs and Issues

(If this PR is related to any other PR or resolves any issue or related to any issue link all related PR and issues here.)

Have you read the Contributing Guidelines on issues?

Yes

[Fellmonkey]

I am also attaching instructions on how to obtain a Unity license painlessly.
manual

[Fellmonkey]

The basic functionality tested in the test is guaranteed to work, but I'm not sure about the rest. I will continue to refine it.

Also, a question: What to implement next for the client SDK?

[Fellmonkey]

The test failed because the secret is not configured in appwrite/sdk-generator.

The successful test is here:
https://github.com/Comanda-A/sdk-generator-b/actions/runs/16206122996/job/45756699934

[Fellmonkey]

// Cookie support
client.SetCookie() / client.GetCookie()

// Real-time subscriptions  
realtime.Subscribe(channels, callback)

// Connection testing
await client.Ping()

The successful test is here:
https://github.com/Comanda-A/sdk-generator-b/actions/runs/16240261125/job/45855715029

[Fellmonkey]

I'm done with cosmetics, now I'm going to implement the SDK into projects and fix anything that's wrong.

I'll also create a temporary repository to allow the community to use the generated Unity SDK.

The successful test is here:
https://github.com/Fellmonkey/sdk-generator/actions/runs/16354634859