Add documentation for more HeLMS methods

[HappyGnome]

At least the methods like getNamesContaining that can be used with respawnable_on_call and constant_pressure_set to add magic string functionality.

[techdr1ve]

If I were to make more comment about Helms I would say focus on Asset pools and create a little library of different .miz case scenarios maybe 5 of them or however many to showcase all the things it can it can do. That seems pretty sophisticated