Ever since we moved to the new loader setup, the shutdown of the SDK never got called as case DLL_PROCESS_DETACH is never hit on time in the SDK module due to the way its loaded/unloaded now.
The init/shutdown functions are now exported, and we let loader handle the load/unload of our SDK now. Loader now also hooks LauncherMain instead of WinMain as WinMain never returns, and therefore, we cannot shutdown the SDK from there. LauncherMain does return then the game is to be closed.
SpdLog_Create() is no longer externed through its header as its a static internal function. Moved SpdLog_Create() above SpdLog_Init() to fix the compile error and rename it to SpdLog_CreateRotatingLoggers(), which is a more suitable name.
* Make sure the workspace path actually exists before attempting to pack it.
* Make sure the VPK directory tree file was parsed correctly before unpacking store.
* Log debug output for each pack operation to a file.
* Fix bug in s_DirFileRegex regex pattern, which would include a trailing '_' in the context part of the directory tree file name.
* Fix bug in 'GetLevelName()' and 'GetDirNameParts()' causing it to parse the path as well, prune the path before running the regex.
* Renamed 'GetLevelName()' to 'PackedStore_GetDirLevelName()'.
* Renamed 'GetDirNameParts()' to 'PackedStore_GetDirNameParts()'.
* Write a front-end enable file when building client VPK's.
