[Auto] [Update] Document External Tilemap built-in collisions and in-game tile manipulation

[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

8dd5da42d Add test projects for the documentation (#8889)
8bce5ef1e Fix storybook
751d64934 Keep explicit empty string operand when rendering event scripts (#8890)
223edb68e Improve object list, project manager and other lists by having top header sticky, including sub-folders (#8880)
1a1bbb903 Fix double menu opening when right clicking in event sheet or animation thumbnails (#8883)
172c755cc Allow creating a group before objects added to it (#8882)
98eab7f91 [Auto PR] Update translations (#8874)
a165fec8c Improve sprite editor performance, especially when having a lot of animations (#8877)
2e6ada9c9 Focus the closest tab when closed, instead of the home (#8879)
17c9c604b Add search Resources tool (#8865)
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:

Summary of documentation changes:

Updated the External Tilemap page (docs/gdevelop5/objects/tilemap/index.md) to reflect two new user-facing capabilities: the object can now generate collisions directly via the new Enable collision and Class filter properties (with guidance on when to still use separate Tilemap collision mask objects), and tiles can now be read and modified in-game (get/set/flip/remove tiles, resize the grid) through actions and conditions. Other commits (AAB label, resources search tool) were internal/UI-only and needed no doc updates.

Please review the changes carefully before merging.

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Project	Deployment	Actions	Updated (UTC)
gdevelop-wiki	Ready	Preview, Comment	Jul 26, 2026 8:57am