feat: add ability to generate dynamic text from nested object

[LordMidas]

Note: Any nested tooltips that use this feature must be parsed after FirstWorldInit and after the nested tooltips framework mod.

Usage:
Enclose the desired field in $ $ within the "text" part of the shorthand tooltip. The value of this field is then pulled from the m table of that object. The usage is similar for Item+ and Perk+. For Perk+ the field is from the perkDef and not an m table.

parseString("[$Name$|Skill+stunned_effect]") // result: Stunned
parseString("[$Name$,|Skill+stunned_effect]") // result Stunned,
parseString("[asdf$Name$,|Skill+stunned_effect]") // result: asdfStunned,

// there is a shortcut available for Name because that is the most common.
// for this just put a blank space between $ $. Example:
parseString("[$ $|Skill+stunned_effect]") // result: Stunned

Metamethods
You can call and chain metamethods on the dynamic field value

parseString("[$Name.tolower()$|Skill+stunned_effect]") // result: stunned

Or even something extreme like:

parseString("[$Name.tolower().slice(0, 2).tointeger()$|Skill+stunned_effect]");