22 feature improve demo UI

[stefanfrench]

@Kostis-S-Z made some UI changes:

For the dataset app:

• Added a title and some instruction steps
• Improved the layout of index and previous/ next
• Changed it so that when you click save recording, you can then instantly record again instead of clicking on the 'x'
• Added queue() which should help experience

For the transcribe app:

• Added a title and some instruction steps

[Kostis-S-Z]

Looks awesome, thanks @stefanfrench !
I pushed a tiny formatting commit to have aesthetic consistency on the code and made some comment-suggestions related to the markdown not being rendered properly.

Just a question, what does the queue=True do in the event listeners in the demo/make_local_dataset_app.py? I read the docs, but didnt really understand why its necessary in this app.

[stefanfrench]

@Kostis-S-Z - thanks for reviewing. I removed the queue function as its not doing anything useful as far as i can tell. I added it originally as i was experimenting on trying to add a loading spinner for when the dataset loads, but it didn't work as expected.

Let me know and I will merge this in

[Kostis-S-Z]

Sounds good! Just run ruff format to fix the linting error and we merge it!