upgrade built-in streamlit app

[rudolfix]

Background We generate a Streamlit app with dlt pipeline ... show. It needs updates to catch up with existing features.

Tasks

1. • [ ] display the staging destination information
2. • [ ] display the staging dataset information (if there are any merge resources)
3. • [x] allow to select schemas if there's more than 1
4. • [x] display more information on a resource: primary keys, merge keys and other hints

look at dlt pipeline commands and port some of the functionalities. there are nice data structures below

1. • [ ] display source state for current schema
2. • [ ] display resource state for particular resource
3. • [ ] list extracted, normalized and loaded packages and allow to see the job, their statuses and errors inside
4. • [ ] display last run trace

Bonus task: Use decompose method of the DltSource to show default execution DAG. you can use networkx to vis (make it optional dependency though)

[munish7771]

can you assign this to me? @rudolfix

[sultaniman]

@rudolfix should we keep this open to work on the remaining points?