Extend variables functionallity

[KingJulian13]

Feature request

This request is meant to discuss about ideas and my examples are probably far from perfect, but before digging into a whole redefinition of variables, I would like to get some feedback.

Some variables should be extended with more subcommands to extract more and detailed information out of them and maybe even extended by some parsing logic.

Examples:

• https://betonquest.github.io/BetonQuest/versions/dev/User-Documentation/Variables-List/#location-location
  Similar with %npc% to %npc.location% and all single coordinates

• %objective.___% could be extended to
  %objective.obj.type% to get the objective type (e.g. block, mobkill etc.)

• %objective.some_delay.left.hours% and so on....

Additionally OR as a replacement, some kind of regex parsing would allow the same results as the single coordinates in locations and probably even more to fit a variables syntax to your conversations needs.

Examples:

• Based on Java String.substring: %string.substr:5,7,location% to only print letters 5-7 of a location.
• Based on Regex & replace: %string.replace:';','-',location% to replace every ; to - in a location. (Haven't thought about a good way to include .yml critical symbols yet)

This feature request should be taken in consideration together with my other request to add more variables but I separated them, as they request different types of changes

Checklist:

• [ X ] I made sure this dosn't already exist (have a look at the wiki)
• [ X ] I made sure this wasn't already suggested (search issues)

[J0B10]

Moved to #1355