Feat: local scene development multiplayer

[NickKhalow]

What does this PR change?

• Added multiplayer testing capabilities for CreatorHub mode
• Extra added support for multiple profiles, each new instance associated with a new profile slot that persists after instance's shutdown
• Implemented native named mutex and process name info because IL2CPP doesn't support it

How to test the changes?

1. Launch your local scene with 2 instances of Explorer client or more via CreatorHub
2. On start of a new instance see auth screen is associated with a new profile. Each new instance has its own profile slot
3. Verify you can interact between instances in multiplayer

Validate this flow on Windows and MacOS (Intel and Arm64)

Our Code Review Standards

https://github.com/decentraland/unity-renderer/blob/master/docs/code-review-standards.md

[github-actions]

Windows and Mac build successfull in Unity Cloud! You can find a link to the downloadable artifact below.

Name	Link
Commit	f6891d0
Logs	https://github.com/decentraland/unity-explorer/actions/runs/13290825240
Download Windows	https://github.com/decentraland/unity-explorer/suites/34296840143/artifacts/2580369181
Download Windows S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/feat/local-scene-development-multiplayer/Decentraland_windows64.zip
Download Mac	https://github.com/decentraland/unity-explorer/suites/34296840143/artifacts/2580318334
Download Mac S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/feat/local-scene-development-multiplayer/Decentraland_macos.zip
Built on	2025-02-12T17:36:34Z