New starting points and update thumbnails

[Bouh]

No description provided.

[github-actions]

Preview the game(s) changed or added in this Pull Request

• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/new-starting-points/examples/starting-3D-platformer/starting-3D-platformer.json
• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/new-starting-points/examples/starting-3d-driving/starting-3d-driving.json
• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/new-starting-points/examples/starting-first-person/starting-first-person.json
• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/new-starting-points/examples/starting-point-and-click-pixel/starting-point-and-click-pixel.json
• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/new-starting-points/examples/starting-point-and-click/starting-point-and-click.json

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This is an automatic message displaying links to the games in this PR - double check the JSON in case of doubt.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 24.1%, saving 165.03 KB.

Filename	Before	After	Improvement	Visual comparison
examples/starting-3d-driving/assets/StartingBackground.png	6.42 KB	277 bytes	-95.8%	View diff
examples/starting-3d-driving/assets/StartingGround.png	12.34 KB	4.65 KB	-62.4%	View diff
examples/starting-3d-driving/preview.png	195.54 KB	171.37 KB	-12.4%	View diff
examples/starting-physics/preview.png	115.83 KB	95.42 KB	-17.6%	View diff
examples/starting-platformer/preview.png	71.45 KB	59.24 KB	-17.1%	View diff
examples/starting-point-and-click-pixel/assets/StartingPixelGroundTilemap.png	1.04 KB	780 bytes	-26.8%	View diff
examples/starting-point-and-click-pixel/assets/StartingPixelPlayer.png	286 bytes	202 bytes	-29.4%	View diff
examples/starting-point-and-click-pixel/assets/StartingPixelWall.png	144 bytes	140 bytes	-2.8%	View diff
examples/starting-point-and-click-pixel/assets/StartingPixelWater.png	7.82 KB	534 bytes	-93.3%	View diff
examples/starting-point-and-click-pixel/preview.png	81.84 KB	67.65 KB	-17.3%	View diff
examples/starting-point-and-click/assets/StartingGroundTilemap.png	11.87 KB	1.72 KB	-85.5%	View diff
examples/starting-point-and-click/assets/StartingPlayer.png	10.16 KB	2.94 KB	-71.1%	View diff
examples/starting-point-and-click/assets/StartingWall.png	5.22 KB	214 bytes	-96.0%	View diff
examples/starting-point-and-click/assets/StartingWater.png	16.01 KB	4.66 KB	-70.9%	View diff
examples/starting-point-and-click/preview.png	98.54 KB	67.65 KB	-31.3%	View diff
examples/starting-top-down/preview.png	49.54 KB	41.63 KB	-16.0%	View diff

6122 images did not require optimisation.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 18.8%, saving 123.16 KB.

Filename	Before	After	Improvement	Visual comparison
examples/starting-3d-driving/preview.png	653.52 KB	530.36 KB	-18.8%	View diff

6137 images did not require optimisation.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 9%, saving 1.54 KB.

Filename	Before	After	Improvement	Visual comparison
examples/starting-point-and-click-pixel/preview.png	17.19 KB	15.65 KB	-9.0%	View diff

6137 images did not require optimisation.