🔧 chore(geti-inspect): Update Geti Inspect to react 19

[MarkRedeman]

📝 Description

• Update to react 19 so that it is consistent with the other Geti apps.

✨ Changes

Select what type of change your PR is:

• 🚀 New feature (non-breaking change which adds functionality)
• 🐞 Bug fix (non-breaking change which fixes an issue)
• 🔄 Refactor (non-breaking change which refactors the code base)
• ⚡ Performance improvements
• 🎨 Style changes (code style/formatting)
• 🧪 Tests (adding/modifying tests)
• 📚 Documentation update
• 📦 Build system changes
• 🚧 CI/CD configuration
• 🔧 Chore (general maintenance)
• 🔒 Security update
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)

✅ Checklist

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• 📚 I have made the necessary updates to the documentation (if applicable).
• 🧪 I have written tests that support my changes and prove that my fix is effective or my feature works (if applicable).
• 🏷️ My PR title follows conventional commit format.

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[Copilot]

Pull Request Overview

This PR updates the Geti Inspect application to use React 19 for consistency with other Geti applications. The changes encompass dependency upgrades, configuration adjustments, and backend improvements.

• Upgraded React and related dependencies from version 18 to 19
• Updated development tooling and added new React compiler plugins
• Corrected backend configuration and file paths

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
app/ui/package.json	Updated React dependencies to v19, added React compiler plugins, corrected package name, and refined engine requirements
app/ui/README.md	Added syntax highlighting to code block
app/backend/src/main.py	Added FastAPI configuration options and updated default port
app/backend/run.sh	Corrected file paths from app/ to src/ directory

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