Should we have a `memray` entry point?

[godlygeek]

Currently we only have memray3.X as an entry point - should we also have memray? This will be more confusing for people with multiple copies of memray installed, but easier for people with only one, and it would make the usage examples from -h line up with how we actually expect it to be used.

[pablogsal]

Yeah, I find a bit annoying having to type memray3.x all the time if I am in a virtual environment. So I am +1 on thos