[Proposal] Category the the localization string class by folder.

[andy840119]

Discussion in the karaoke-dev/karaoke#1265 (comment) with @smoogipoo
It will be better if localization string can be place into different folder in the Localisation

Here's the solution figured out by @smoogipoo:

MyProject
|- Localisation
   |- Chat
      |- ...                        => *Strings files  <-------------------|
   |- SomeOtherLargeNamespace                                              |
      |- ...                        => *Strings files <--------------------|------------------|
|- UI                                                                      |                  |
   |- Chat                                                                 |                  |
      |- .editorconfig              => Maps to Localisation/Chat namespace |                  |
      |- ...                                                                                  |
   |- SomeOtherLargeNamespace                                                                 |
      |- .editorconfig              => Maps to Localisation/SomeOtherLargeNamespace namespace |
      |- ...
|- Resources
   |- ...