Chore: replace ts-node with tsx

[katspaugh]

What it solves

Tsx seems to be more maintained. Also, there's no need to run yarn css-vars on each install as its resulting file is commited to the repo.

[github-actions]

Branch preview

✅ Deploy successful!

https://tsx--walletweb.review-wallet-web.5afe.dev

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

---

^{Report generated by eslint-plus-action}

[github-actions]

📦 Next.js Bundle Analysis for safe-wallet-web

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	75.92%	9983/13149
🔴	Branches	50.14%	2036/4061
🔴	Functions	58.73%	1494/2544
🟡	Lines	77.5%	9020/11639

Test suite run success

1095 tests passing in 154 suites.

Report generated by 🧪jest coverage report action from 89983fb