Allow manually mapping sources to parsers

[PhantomShift]

Give users the ability to map a Tachiyomi/Mihon sources to Kotatsu parsers manually, with any or all of the following methods

Source to Parser List

• url, name, id input and output

# name -> ID
NAME mangadex ID MANGADEX

# ID -> name
ID 2971557565147974499 NAME Comick

# url -> url
# idk lol
URL sinensisscan.net URL sinensisscan.com

Lua Script

Expose manga objects to lua scripts that run comparison functions.
Example:

function mapSource(source)
    if source.id == 4201337 then
        return "id", "EXAMPLE"
    end
    if source.url:match("something.com") then
        return "url", "something.net"
    end
   -- not applicable
   return nil
end