[Feature]: Support file change watching other than in app.py location

Category

Dev Tools

Scope

Quality of Life

Problem

When I start the app, I get the message
INFO: Will watch for changes in these directories: [...
It would be nice to be able to add some directories to this. In my case, I am using uv for project management and my app depends on the numerical libraries I am working on which are not in the same directory as the app.
Sometimes I use the running app to validate the numerical libraries. If I need to modify the libs, and see the results, I need to manually restart the shiny app. If I could somehow indicate an additional directory to watch for changes, this would make life easier.

Solution

Somehow enable a config that provides additional watch directories. It would be best if this were compatible with the "run" button in vscode.

Alternatives (Optional)

No response

Example (Optional)

Impact (Optional)

No response

Contribution? (Optional)

None

Start by tracing the app.py-based file-watching configuration and the run-button path used by VS Code. Determine how additional directories could be configured, then verify that changes in an external numerical-library directory trigger the running app to restart without manual intervention.