Add alternative delimeter for X/Y plot script

[freezerain]

Problem: when using X/Y plot script comas parsed as plot delimeter

Suggestion:
-make an option to use alternative delimeter, for examle "||" (can conflict with infinite tables), "//", "..." or anythin that user specifies in settings
-rework prompt_parser.py to hijack promp before X/Y script

Example of "[girl:dragon:0.1,0.5], " Prompt S/R

[freezerain]

it shoud be [girl : dragon] but github decided to insert emoji in my message, while it is cute yet confusing

[ljleb]

X/Y/Z values are CSV entries. To put comas, you can put an entry in quotes like this:

"[ girl : dragon : 0.1 , 0.5 ]"," "

Note: make sure there is no extraneous whitespace around double quotes " and commas ,, otherwise the CSV field parsing may behave differently.

[freezerain]

oh thank you