#5488 Drag and Drop Images

[MarlowBrown]

Contributor checklist

• [x] My commits are rebased on the latest main branch
• [x] My commits are in nice logical chunks
• [x] My contribution is fully baked and is ready to be merged as is
• [x] I have tested my contribution on these devices:

• iPhone 12 iOS 18.4.1

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Description

This pull request introduces (fixes #5488) a common feature in many chatting applications, but is not currently present in Signal. This feature allows the user to drag and drop images straight into any conversation thread. I tested this by dragging and dropping different image UTIs (pngs, jpegs, etc) along with images that are and arent sticker size (images below 512 pixels).

Test dragging into text input bar

https://github.com/user-attachments/assets/4b94dc2c-4b76-45df-8642-269d18b70927

Test dragging into conversation view controller view

https://github.com/user-attachments/assets/2782bf20-488c-4304-9310-0a543f458986