add a public VI "check if module executable" to each module

[TiTou]

My use case is simple :

I have a module that uses DAQmx functions, so the module's main VI will only be executable in DAQmx is installed.

Having a public VI from the module to check if the main.vi is executable is, I think, the fastest way for my app to report that a feature is not available due to missing driver.