Update texture_atlas example with different padding and sampling

[antoniacobaeus]

Objective

• Expand the texture_atlas example with padding and show how it can resolve sprite bleeding for different types of sampling.
• Fixes Expand the texture atlas builder example to demonstrate more features #9522

Solution

Updated the texture_atlas example by adding 4 different texture atlases:

1. linear, no padding
2. linear, padding
3. nearest neighbor, no padding
4. nearest neighbor, padding

Now renders one padded and one unpadded texture atlas, and the same upscaled sprite from each of the new texture atlases. See the screenshot below (taken on 1080p monitor).

From left->right: linear no padding, nearest no padding, linear padding, nearest padding.

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[alice-i-cecile]

Nice stuff! Good docs, simple and clean code.

[ickshonpe]

Two requests:

• I have to resize the window to view all of the images. Everything should fit into the default window size.
• It would be good to have a label for each of the piggy shopkeepers detailing the filtering and padding that has been applied to their sprite.

Otherwise an excellent first contribution, does exactly what we wanted.

[antoniacobaeus]

Added the requests mentioned above. The example should now fit in the default window size, and labels are added to display the different settings, see image below.

Since it seems like text2d is broken on main I had to merge with #9708 to test the labels. I manage to get the text to show, but got some artifacts which shouldn't be present when text2d works properly.

[ickshonpe]

Sorry for not rereviewing earlier, the changes are exactly what I asked for. Looks great now.
Text2d works again I think, so once you've merged with main this is ready to go.

Ignore my remaining comments if you like, they are only stylistic and not blocking at all.

[alice-i-cecile]

CI is failing: fix that up and I'll merge this in for you <3