[Auto] [Update] Document per-behavior and per-object icons for extensions

[github-actions]

This PR was automatically generated by the Update docs from GDevelop commits workflow.

An AI coding agent analysed recent commits in 4ian/GDevelop
and updated the documentation to reflect user-facing changes.

GDevelop commits covered

bdcc9f106 Fix potential crashes in the scene editor
5ab1ccd39 Improve logs in case of UseAfterFreeError
25863e09f Fix potential crashes in the scene editor
02d44e46a Add null safety checks for aiRequest.output property (#8486)
e3ffdf59a Bump newIDE version
e07a8d848 Fix more potential crashes (#8485)
a3b766d1e Fix potential crash in the object properties (#8484)
c364fa899 Fix potential crash in instance properties (#8483)
70f4cf1c1 Fix potential use-after-free in instance properties when deleting scene instances (#8481)
b5ea632ce Upgrade react-dnd to v14 and simplify drag-and-drop setup (#8479)
0f7447feb Bring forward the preview window on the web-app when hot-reloading (#8478)
165648298 Fix some fields of the extension properties (#8480)
cb4263a4b Ensure JSON files end with a new line (#8469)
92e449558 Allow extensions to set different icons for behaviors and objects (#8472)
24ae6c33d Introduce a direct link to open the create dialog (#8460)
2d6ee9164 Fix potential UseAfterFreeError on VariablesContainer.serializeTo
a28869b0b Bump newIDE version
45ac7aaa3 Fix Spine objects not properly loading in the editor anymore (#8476)
a2a8a4c33 Fix a crash when deleting a function folder while one of its function was selected (#8475)

The AI agent summary is:

Summary of changes:

1. docs/gdevelop5/behaviors/events-based-behaviors/index.md — Added a tip noting that each behavior can now have its own icon (separate from the extension icon), set via the Icon URL field in the behavior configuration.

2. docs/gdevelop5/objects/custom-objects-prefab-template/index.md — Added a tip noting that each custom object can also have its own icon independent of the extension icon.

3. docs/gdevelop5/extensions/best-practices.md — Added a "Set an icon" subsection explaining the extension icon field and the new ability to set separate icons for individual behaviors and objects within the extension.

Please review the changes carefully before merging.

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Project	Deployment	Actions	Updated (UTC)
gdevelop-wiki	Ready	Preview, Comment	Apr 6, 2026 8:45am