Build and upload from any file within the project

[guatedude2]

This is not an issue, more of an enhancement. When clicking the build or upload buttons (in my case the keyboard shortcut) it would be nice not have to switch back and forth between the opened ino file and the .hpp files within the project.

Here's the PR for that enahancement: https://github.com/steve3d/arduino-vscode/pull/9

[steve3d]

I think it's better to make this as a option, if this option value is null, then build and compile will work on current opening file, if not , the build and upload will work on designated file.