Support Entity flipping and 90° rotations

[deepnight]

Related:

• Pivot-based entity flips #856
• Entity flips #809
• Add rotation support for entities. #502
• Allow negative resize and flipping for entities #977
• Support for Entity Rotation #841

[Miepee]

Is there a specific reason why rotation is limited to 90° angles? I could see full 360 rotation being useful for some scenarios.
Not a dealbreaker for me, personally, but maybe for other people.

[Gamer-XP]

You can rotate 90, 180, 270 with just 90 rotation option. FlipX+Y = 180 rotation. FlipX+Y+90Rotation = 270 rotation

[Lojemiru]

If it helps, I've reconciled my entity flips PR (both pivot-based and within bounds) with the recent updates. Could open a new PR with that branch but I've admittedly been ignoring it a bit since it went silent for so long.

[deepnight]

Thank you for your patience 🙇 I had some priorities on my LDtk roadmap before I could properly take care of these changes.