Command install: Eliminate the double powershell code parts

[krotz-dieter]

#265 Child of Eliminate the double powershell code parts...

Functionality: k2s install ... k2s install command

Eliminate double code parts in high level scripts used Move those functionalities under the PowerShell modules and scripts -> lib

Steps:

• use a branch, keep the branches for the issue as short living as possible (often merges to main)
• keep for start the high level scripts which are called from k2s cli directly
• in each high level script sync first the functionality within separate modules from lib
• delete afterwards the functionality from the high level scripts, eliminate with this the double code
• remove the common global variables and global functions parts from the high level scripts
• use at the end high level scripts from scripts which are using exclusively lib modules