fix: clear smart wearable cache

[daniele-dcl]

Pull Request Description

Fixes #6283

Switching profile without closing the app would not stop running Smart Wearable scenes.

What does this PR change?

On logout we need to unload any smart wearable scene that is running and clear any related cached info.

• I added a new event published with the generic IEventBus on log out
• A system in the Smart Wearables plugin listens to that event and handles it by performing all of the necessary cleanup

Test Instructions

1. Log in with a user that has a Smart Wearable, possibly one that adds some clearly visible UI on screen
2. Log out WITHOUT closing the app and switch to a different player
3. Now you should NOT see the effects of the previously equipped SW anymore, e.g., no more extra UI
4. Switch back to the profile with SWs, still without exiting the app, the SW should resume running normally

No need to go to any specific place.

[github-actions]

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

Name	Link
Commit	87bef63
Logs	https://github.com/decentraland/unity-explorer/actions/runs/20369504377
Download Windows	https://github.com/decentraland/unity-explorer/suites/52659373801/artifacts/4924773441
Download Windows S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/fix/clear-smart-wearable-cache/pr-16916-87bef63/Decentraland_windows64.zip
Download Mac	https://github.com/decentraland/unity-explorer/suites/52659373801/artifacts/4925107346
Download Mac S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/fix/clear-smart-wearable-cache/pr-16916-87bef63/Decentraland_macos.zip
Built on	2025-12-19T14:25:17Z

[lorenzo-ranciaffi]

Left only a comment, looks good otherwise 👍