fix: do not use global JSX namespace

[SimenB]

This does not work with React 19 types.

https://react.dev/blog/2024/04/25/react-19-upgrade-guide#the-jsx-namespace-in-typescript

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 75008ef. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

---

✅ Successfully ran 2 targets

• nx affected --targets=test:format,test:eslint,test:unit,test:build,build --parallel=3
• nx affected --target=test:types --exclude=examples/**

---

Sent with 💌 from NxCloud.