Added a new preference (`arduino.monitor.dockPanel`) to specify the
location of the application shell where the _Serial Monitor_ widget
resides. The possible values are `"bottom"` and `"right"`. The default\
value is the `"bottom"`.
The dock panel is per application and not per workspace or window.
However, advanced users can create the `./.vscode/settings.json` and
configure per sketch preference.
Signed-off-by: dankeboy36 <dankeboy36@gmail.com>