Version check and small things

[FloSch62]

This PR will introduce:

• a automatic install if clab if the user does not have clab installed ( add user to the clab_admin if yes )
• automatic check if there is a new clab version -> automatic upgrade if yes
• sudo is now disabled by default
• Try to fix path problems on other OS'es
• Settings for the drawio default theme, now with fancy nokia_modern insteand of nokia as default

[kaelemc]

For all these new functions in extension.ts. I think you should make a helpers subdir, add them in there and then import