Add a way to set/toggle indivitual elements of a list from .settings

[chri-k]

Describe the feature

Add a way to modify settings that are lists (like block-esp blocks) without overwriting the entire list.

A reasonable syntax would probably be something like

.settings block-esp blocks [add/remove/toggle] minecraft:acacia_button, minecraft:acacia_door

The main use case of this would be in macros.

It seems that getting tab completion to work will be the largest source of required changes here

Before submitting a suggestion

• This feature doesn't already exist in the client. (I have checked every module and their settings on the latest dev build)

• This wasn't already suggested. (I have searched suggestions on GitHub and read the FAQ)

[chri-k]

I will probably end up making a PR for this myself if i find the time

[DrParanoya]

#5178

[chri-k]

it appears that i somehow picked all the wrong keywords to search with.