Request: support indent guide for IDLE in editor window (i.e. not interactive shell)

there appears to not be currently support for indent guides in idle

one take is that idle is meant for small scripts and one should seek out a more complex IDE if it gets to the point of needing indent lines https://stackoverflow.com/q/66231105

i think that there would still be value in indent lines even in IDLE. it is a popular IDE for beginners and even in short scripts there can still be sufficiently large indented blocks, relatively speaking. it doesn't take that much code for indent guides to become helpful.