[Auto] [Update] Document runtime tile editing and built-in collisions for External Tilemap object

[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

a462fa46c Optimize tile map trimming (#8876)
561c43464 Allow to edit external tile maps at runtime (#8830)
0f0450577 Enhance CLI export behavior with diagnostic error handling (#8864)
905ad8151 Fix importation of extensions with dependency between them (#8875)
bfe1bcc31 Run CLI commands in the live editor when the project is already open (#8847)
5b819bcdc Mention the Android file format ".AAB" in the Android export dialog (#8873)
e198d71fb [Auto PR] Update translations (#8866)
48b3de60c Fix not encoding urls properly, leading to resources not loaded on mobile apps (#8870)
ba15395cd Do not render the auto-declared loop index variable as a local declaration (#8869)
b15ee15b5 Match objects with unicode names in EventScript source view filters (#8868)
17451c960 Allow building GDevelop for dev environments (#8867)
62756638d Experimental more robust events generation (#8863)
5f6168be8 Add and split tests of EditorFunctions + fix layer instances deletion (#8862)
2901e773c Fixes of put tool when erasing and wrong id-object match (#8861)
c9fdf9851 [Auto PR] Update translations (#8849)
fbc26bf75 [Auto PR] Update extension translations (#8857)
a1f21d086 Expose in app tutorial state to url (#8859)
de61eaf86 Fix variable parameter "add or edit" auto-completions (#8856)

The AI agent summary is:

Documentation summary:

Updated the External Tilemap page (docs/gdevelop5/objects/tilemap/index.md) to reflect that this object can now be edited at runtime (get/set/remove/flip tiles, change grid size via actions and conditions) and can generate collision masks directly through new Enable collision / Class filter properties, without requiring a separate Tilemap collision mask object.

Please review the changes carefully before merging.

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Project	Deployment	Actions	Updated (UTC)
gdevelop-wiki	Ready	Preview, Comment	Jul 23, 2026 9:03am