Feature request: check which nodes (installed/not installed) use a library

[EricRollei]

When considering installing a new set of nodes, I always check the requirements.txt list. I keep a list of libraries installed via pip list and can check to see if I already have or need to install them. But I can't see if a custom node set has a version requirement for those dependencies. I always get scared something will be broken when the requirements.txt has:
Some_library>=10.3.0
Some_other_library==1.1.2

It would so great to open the manager and search to see if my installed node has already Some_library==9.2 because then I'd know that will cause problems.

I have no idea how hard it would be to add this feature, or how difficult it would be to maintain, but something like that would be awesome.

[ltdrdata]

I'll address this issue later.