user feedback for restarting things

[SushiFanta]

add messages to tell user when they need to close the window:

• [ ] after bootstrapping t3x, user needs to start a new bash session or source bashrc in order to use t3x command
• [ ] after setting up starship, user needs to ??? (at least close all lxterminal instances, possibly restart the pi)
• [ ] add confirmation to install node red before wiping their screen