[Auto] [Update] Document Layer property, cross-scene object preloading, and Select All events

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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

391caaddf Add internal hints for objects without known width/height (#8608)
d9d8a7d3e Fix a regression on the displayed position of custom objects (#8604)
c8d5f4600 Add a button in the extension editor to select behaviors with the dialog (#8602)
f9d1d4c60 Fix and show the button to add parameters to "action with operator" functions as disabled (#8603)
d81a6899d Allow to create variables from autocompletion in more cases (#8583)
cacd28eed Add a "layer" property type for custom behaviors (#8596)
e2de84627 Allow to load and unload objects from other scenes (#8592)
584cca2d4 Export classes in ResourceLoader for better TypeScript compatibility (#8594)
0b3f8e720 Improve types for TypeScript 6 (#8591)
4bb652f5e Fix Ai Panel not aligned to the top properly on mobile + improve games search to be more relevant (#8590)
f60562eae [Auto PR] Update translations (#8585)
1c17c895b Allow custom objects to move layer cameras (#8572)
651c93ae1 Add "Select All" in Events Sheet and ability to deselect an event when doing a multi-selection (#8578)
0eb6014a9 Fix some visual glitches in the Events Sheet when opening and scrolling (#8571)

The AI agent summary is:

Summary of documentation changes:

• behaviors/events-based-behaviors/index.md — Added the new "Layer" property type to the list of behavior property types, and mentioned the new button to pick a required behavior through a dialog.
• all-features/resources-loading/index.md — Noted that the Preload object / Unload object actions now accept an optional scene name parameter to operate on objects from another scene.
• interface/events-editor/index.md — Added a short "Select events" section covering multi-selection, deselection of an already-selected event, and the new "Select all" entry.

Please review the changes carefully before merging.

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Project	Deployment	Actions	Updated (UTC)
gdevelop-wiki	Ready	Preview, Comment	May 18, 2026 9:30am