Some of the `frand_range` calls were used for integer calculations, so we can use `Random::next` now.
This also reduces the number of C-style casts in the codebase.
* Add SpawnShipCheat and convert Bravos spawning to it
* Clean-up and add canUseCheat() check
* Move some stuff to parent CustomCheat class
* Add cheat-used SEXP and On Cheat scripting hook
* Add cheat tbls and tbms, fix custom cheat detection, move cheat hooks to global hooks
* Add a default virtual destructor to CustomCheats for its derived classes to use
* Initialize buffers with memset so clang will calm down, also move cheat check a bit to keep old cheats
* Attempt to appease MSVC
* Clean-up and formatting
* Ensure custom cheats fit in the cheat code buffer
* Fix a merge mistake
* Move pre-set cheat to embedded cheats table
* Use appropriate types for stuff_string
* Remove unnecessary copying of the cheat buffer
* Explicit nullchecking
* Avoid copying values for initializing CustomCheat
* move cheat checking function to cheats_table.h, fix a typo
* Clarify OP_USED_CHEAT sexp description
* Remove unnecessary casting
* Use list initalization for Ship Cheats
* Move a few method definitions from the .h to .cpp
* Change buffer to const char*
Goober5000