Build profiling option

[Shfty]

Should be implemented as a checkbox on QodotMap and cause information to be printed to the log during build.

Possible data:

• Entity / brush / face / vertex counts
• Map / entity / brush / face build times
• Custom node spawn count
• Loaded texture count
• Generated material count

Feel free to drop extra ideas in here if you have any @Calinou

[Shfty]

I've implemented a cursory set of build data that includes entity and brush counts as well as total build time.

Will likely codify execution time profiling into a helper class for the more granular stuff like build step-specific durations.

[Shfty]

I've added duration profiling for every build step in the latest commit.