textfields: fix RTL layout for SVG exports

[mimecuvalo]

Followup to https://github.com/tldraw/tldraw/pull/3188 (although this problem was there before that PR)

This does more work for RTL rendering in SVG context, especially since we position each span one-by-one.

I had to do a bit of esoteric spelunking and it turns out unicode-bidi: plaintext solves our issue even though it isn't really recommend to be used by web developers. Fun times 🙃

Before:

After:

Change Type

• [x] sdk — Changes the tldraw SDK
• [ ] dotcom — Changes the tldraw.com web app
• [ ] docs — Changes to the documentation, examples, or templates.
• [ ] vs code — Changes to the vscode plugin
• [ ] internal — Does not affect user-facing stuff

• [x] bugfix — Bug fix
• [ ] feature — New feature
• [ ] improvement — Improving existing features
• [ ] chore — Updating dependencies, other boring stuff
• [ ] galaxy brain — Architectural changes
• [ ] tests — Changes to any test code
• [ ] tools — Changes to infrastructure, CI, internal scripts, debugging tools, etc.
• [ ] dunno — I don't know

Test Plan

1. Test LTR text.
2. Test RTL text.
3. Test mixed LTR/RTL on different lines.

• [ ] Unit Tests
• [x] End to end tests

Release Notes

• [Add a brief release note for your PR here.](textfields: fix RTL layout for SVG exports)

[vercel[bot]]

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Name	Status	Preview	Updated (UTC)
examples	✅ Ready (Inspect)	Visit Preview	May 3, 2024 0:17am

1 Ignored Deployment

| Name | Status | Preview | Updated (UTC) | | :--- | :----- | :------ | :------ | | **tldraw-docs** | ⬜️ Ignored ([Inspect](https://vercel.com/tldraw/tldraw-docs/AjtJVFn1u3DiggT1CBfMaetcVsuN)) | [Visit Preview](https://tldraw-docs-git-mime-rtl-svg-export-tldraw.vercel.app) | May 3, 2024 0:17am |

[steveruizok]

Updating the snapshots here (as I recently learned, we can trigger an update in CI by adding the "update snapshots" tag)

[hossain666]

https://github.com/apple/swift/blob/main/utils/pygments/swift.py[__](https://github.com/apple/swift/blob/main/utils/pygments/swift.py)