* Fixes#4644.
* Initialize all battleground queues at startup to reduce overhead of creation/deletion during live server.
* Removes lots of duplicate code between team checks.
* Adds missing checks for script commands bg_leave and bg_desert to only warp players out using the Battleground Queue System.
* Adds documentation for script commands bg_leave and bg_desert to state players will be warped out after when using the Battleground Queue System.
* Optimizes join logic to add new players to the end of the queue rather than the front.
* Cleans up the client messages so certain responses are cleared when they need to be.
Thanks to @Balferian and @Lemongrass3110!
* Fixes#1310.
* Added a battle config which allows toggling of the Battleground Queue client feature and also toggles between the modes of scripts.
* Added script commands bg_reserve, bg_unbook, and bg_desert.
* Removed old custom Battleground scripts.
Thanks to @Lemongrass3110, @Locien, @secretdataz, @InusualZ, @Normynator, @Atemo, @iubantot, @admkakaroto, and @noobzter003!
* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.
* Initial progression of moving the map-server to C++ format.
* Converted all core files to .cpp and header files to .hpp.
* Refactored the refine database parser to utilize native YAML C++.
Thanks to @Jeybla and @lighta for their help!
