Feature Request: Add hot reload upon button press

[KoehlerT]

When using a devcontainer on windows with the local (windows) filesystem mounted, the --watch and --backend flags do not work for automatic reloading of the code. A feature to support hot reloading when entering a letter in the running UIX Promt e.g. 'r' would really help.

Additionally it may be nice for development to only reload upon request, if saves inbetween edits corrupt the webpage and pose problems for debugging.

There is a similar feature in flutter: Flutter Hot Reload
If you're running the app at the command line using flutter run, enter r in the terminal window.

The code should be somewhere here

uix/src/runners/run-local.ts

Line 182 in c2e6751

else if (isWatching) {