Feature: Improve awareess about current path and current program/project

[screamerbg]

This small PR aims to improve the awareness of the user about the current location and current program by adding output to every mbed command.

Here's an example:

D:\Work\smcc-tests\simple-mbed-cloud-client> mbed detect
[mbed] Working path "D:\Work\smcc-tests\simple-mbed-cloud-client" (library)
[mbed] Program path "D:\Work\smcc-tests"
[mbed] No mbed targets were detected on your system.

and also

D:\Work\smcc-tests> mbed detect
[mbed] Working path "D:\Work\smcc-tests" (program)
[mbed] No mbed targets were detected on your system.

[cmonr]

LGTM

[cmonr]

Not sure what that last commit was about, but CI didn not like it one bit.

[screamerbg]

@cmonr Working on it ;)

[screamerbg]

@cmonr looks like all is good 👍

[cmonr]

Interesting. Still LGTM.

Kinda odd that GH didn't clear my original OK with the new commits...

[cmonr]

@theotherjimmy Thoughts?

[theotherjimmy]

@cmonr We can change the settings to dismiss stale reviews if you think it would be appropriate.

[cmonr]

@theotherjimmy I think it would help.