new formatting plugin system, new Compact formatting plugin

[SinusPi]

• added support for formatting plugins, able to modify the display of Message, Stack and Locals.
• "Compact" formatting plugin included, with an explanatory screenshot.
• switching of plugins is available in the config panel.

[SinusPi]

Well, good job me, forgot to add the one file core to the idea.

[funkydude]

Nice work! I'll take a proper look at this later but for now I did a quick skim:

• Remove the image, don't think we need this
• The hard-embedded kind of half-library code should just be merged into the core addon and not used as a library
• The new files are missing newlines at the end

[SinusPi]

• The image was there just for illustration purposes, probably should've been just part of a comment.
• I was undecided on the parsing half-lib. Very well, moving it into the main file space.

[funkydude]

Sorry I totally forgot about this. Are you still interested in working on it?

[SinusPi]

Time permitting, sure - but I thought I brought it to a workable state already.

[MyTechnoHunter]

as a followup, i grabbed the PR and tested it, changing the formatter dropdown from anything to raw causes an error.

10x Interface/AddOns/BugSack/core.lua:247: bad argument #1 to 'format' (string expected, got nil)

Stack:
[string "=[C]"]: in function format' [string "@Interface/AddOns/BugSack/core.lua"]:247: in function FormatError'
[string "@Interface/AddOns/BugSack/sack.lua"]:90: in function <Interface/AddOns/BugSack/sack.lua:32>
[string "@Interface/AddOns/BugSack/sack.lua"]:128: in function <Interface/AddOns/BugSack/sack.lua:124>
[string "=[C]"]: ?
[string "=[C]"]: in function UpdateDisplay' [string "@Interface/AddOns/BugSack/config.lua"]:78: in function func'
[string "@Interface/SharedXML/UIDropDownMenu.lua"]:1007: in function `UIDropDownMenuButton_OnClick'
[string "*UIDropDownMenuTemplates.xml:136_OnClick"]:1: in function <[string "*UIDropDownMenuTemplates.xml:136_OnClick"]:1>

Locals:
(*temporary) = "

Stack:
%s"
(*temporary) = nil
(*temporary) = "string expected, got nil"