Use the drawlist wrapper instead of relying on ImGui windows (which didn't work to begin with). Also fixed all text colors that weren't converted from the previous library.
The old one doesn't work properly with the new ImGui library since the upgrade in commit 949d01da7935d957e0a01cbd592364e74008d8c4. Moved to the use of ImPlot which was added in commit c2df5e19bf332db0ff24849ee5bbb4c033c51117.
All recast/detour allocation and assertion code were identical, with the exception of their names (rc* for recast, dt* for detour). We want to use Recast's rcVectorBase class in Detour code, as there is no Detour equivalent, but copying it in its whole isn't good practice (especially considering there is more boilerplate code we want to get rid of in the future). Moved these to Shared so Detour could use it as well under the name rdVectorBase (rd stands for Recast Detour). No changes to the logic of the code were made in this patch.
The code assumed an extension of 3 characters, but .gset is 4 and is also supported, causing a trailing '.' as it only truncates the training 4 characters (including the null char). The code now searches for the extension delimiter and gets the actual model name regardless of the length of presence of an extension.
