feat(form/inputs): add support for image drop+paste in PTE input

[sjelfull]

Description

This adds support for drag-n-drop + pasting of images and files into the Portable Text Input inside the studio.

What to review

Testing

1. Open this test document in the test studio
2. Try to test the different scenarios on the Text field:

• Drag 1 image
• Drag 2 images
• Drag a invalid file (something not PDF)
• Drag 1 PDF file
• Drag 2 PDF files

3. Now do the same, but pasting instead.

Notes about PR

• Paste component test is skipped in Firefox because the security model doesn't allow us to make a synthetic test

Notes for release

• The Portable Text Input now supports drag-n-dropping + pasting of images and files into Image and File blocks

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
performance-studio	✅ Ready (Inspect)	Visit Preview		May 2, 2024 2:48pm
test-next-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 2, 2024 2:48pm
test-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 2, 2024 2:48pm

1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
studio-workshop	⬜️ Ignored (Inspect)	Visit Preview		May 2, 2024 2:48pm

[github-actions]

No changes to documentation

[github-actions]

Component Testing Report Updated May 2, 2024 2:48 PM (UTC)

File	Status	Duration	Passed	Skipped	Failed
comments/CommentInput.spec.tsx	✅ Passed (Inspect)	40s	15	0	0
formBuilder/ArrayInput.spec.tsx	✅ Passed (Inspect)	6s	3	0	0
formBuilder/inputs/PortableText/Annotations.spec.tsx	✅ Passed (Inspect)	27s	6	0	0
formBuilder/inputs/PortableText/copyPaste/CopyPaste.spec.tsx	✅ Passed (Inspect)	31s	11	7	0
formBuilder/inputs/PortableText/Decorators.spec.tsx	✅ Passed (Inspect)	14s	6	0	0
formBuilder/inputs/PortableText/FocusTracking.spec.tsx	✅ Passed (Inspect)	35s	15	0	0
formBuilder/inputs/PortableText/Input.spec.tsx	✅ Passed (Inspect)	1m 8s	13	0	0
formBuilder/inputs/PortableText/ObjectBlock.spec.tsx	✅ Passed (Inspect)	1m 5s	18	0	0
formBuilder/inputs/PortableText/RangeDecoration.spec.tsx	✅ Passed (Inspect)	20s	9	0	0
formBuilder/inputs/PortableText/Styles.spec.tsx	✅ Passed (Inspect)	15s	6	0	0
formBuilder/inputs/PortableText/Toolbar.spec.tsx	✅ Passed (Inspect)	22s	9	0	0

[jtpetty]

👍 - thank you for adding tests!

[skogsmaskin]

Great work @sjelfull!

Thanks for this.