Generalized Profileset Control

[renanthera]

Derived from the concept found in #10597, but generalized to allow for custom implementation in class modules.

Significant outstanding issues:

• Many relevant player methods are useless at current profileset_controller_t::evaluate_* calls, as they only return sensible values during iteration runtime. Checking whether or not a player has a sufficient amount of a secondary stat, etc, is impossible as a result.

TODO:

• Implement error-based sim controller.
• Cherrypick from TeWaWi to Midnight.

Developer interface issues:

• Every derived profileset_controller_t requires a using data_t = <derived from profileset_controller_data_t>; type alias. Every controller probably should get and set a derived profileset_controller_data_t, just for the sake of reporting, as it is otherwise impossible to customize.
• profileset_controller_t::get_data<T>() and profileset_controller_t::set_data<T>(...) require a template parameter which is always equal to the type-aliased data_t for the derived profileset_controller_t. This kind of sucks, but I'm not sure of a way to avoid this without introducing manual mutex management and gratuitous casting.

Notes:

• Options are parsed from strings on construction/init of each profileset.
• Implementing profileset_controller_t::create_options() is kind of awful if the option value type isn't well supported.

[renanthera]

Still researching best practices for statistical methods required to implement profileset culling in the most optimal/correct way.

The rest of the implementation is otherwise functional.