Installation instruction for pip are missing

[milosevic]

To make installation process as simple as possible we should add also instructions for the pip.

[rnbguy]

pip is pretty standard package in any popular Os. Any default package manager, came with user's machine, should support it.

Otherwise, we can add links to

• Official python docs https://packaging.python.org/en/latest/tutorials/installing-packages/#ensure-you-can-run-pip-from-the-command-line
• Office pip docs - https://pip.pypa.io/en/stable/installation

Do these help?

But, in the worst case, we should assume any kind of breakage. If you faced any issues while installing pip or running pip install atomkraft, please report so that we can update docs accordingly.