feature: automatically generate collisions from tiled data parsed by the tilemap extension

[blurymind]

BEFORE opening a new feature request, please make sure that you:

• Discussed it on the discord or the forum,
• There is not already a suggestion about it in the issues or in the roadmap: https://trello.com/b/qf0lM7k8/gdevelop-roadmap
• Consider commenting on the roadmap if something is important for you

AFTER opening the feature request, the issue will be closed by a maintainer (@4ian or someone else) and a card will be added in the roadmap if it's relevant and does not exist yet :)

Description

Currently gdevelop can parse tiled files and render tilemaps from them.
The user however still needs to manually create collision objects within gdevelop.

Solution suggested

Describe the solution
Tiled lets you create shape objects and collisions on tiles.
The tilemap extension can use this data to create collision shape objects - potentially the user needs to be able to

• enable/disable this feature - for shape objects and/or tile shapes (more expensive if each tile has a collision - so not sure if we want to allow that)
• only create collisions for shape objects that are in a specific group, maybe even detect the tiled data group a collision belongs to when colliding with it
• potentially the optional ability to preview collisions generated by the tilemap extension's parser - in the IDE

Alternatives considered

A clear and concise description of any alternative solutions or features you've considered.

trello board card here: https://trello.com/c/3B6otFoa/481-add-ability-to-automatically-generate-collision-shapes-to-the-tilemap-extension

[tristanbob]

Has anyone made a bounty for this? If so, I would like to contribute to it.

[tristanbob]

I think this has to be a Github issue in order for BountySource to see it. Is that right?

[4ian]

Yep we would need to open a GitHub issue. I've done it here: #2775