svelte5-mfes

To run this demo:

1. Open a new console.
2. Move to the mfe1/ folder: cd ./mfe1
3. Install packages: npm ci
4. Run the development server: npm run dev
5. Open a new console.
6. Move to the root/ folder: cd ./root
7. Install packages: npm ci
8. Run the development server: npm run dev
9. Open the root's webpage: o + ENTER

To see the reactivity issue, change the slider's position. This will change the opacity property inside the preferences class instance. The slider and the preferences class belong to the root micro-frontend. This will trigger various messages in the console that should make the reactivity problem clear: Reactivity is lost in the consuming mfe1 micro-frontend.