* Eliminate unnecessary abstraction for path finding
* Pass the goal to ChooseDirection instead of using globals
* Remove gPeepPathFindGoalPosition and pass it by parameter instead
* Remove _peepPathFindIsStaff and make ignoring banners explicit
* Code style and naming fixups
* Apply clang-format
* Add comment specifying to why it does not ignore banners
* Apply review comments
* Add `STR_ERR_CANT_CHANGE_PARK_ENTRANCE_FEE`
* Add `STR_ERR_TRACK_ON_THIS_TILE_NEEDS_WATER`
* Return existing `GameAction::Result`
* Add `STR_ERR_ACTION_INVALID_FOR_THAT_STAFF_TYPE`
I am open to suggestions for a different message!
Originally this was going to be STR_ERR_WRONG_STAFF_TYPE
but I thought that was confusing because the game
action arguments do not specify a staff type. We
want it to mean "the staff ID you specified is the
wrong StaffType for this game action".
* Refactor `StaffSetColour()` to return `Result`
* Remove unnecessary arguments when `Status` is `Ok`
* Refactor `SwapTileElements()` to return `Result`
Also add STR_ERR_CANT_SWAP_TILE_ELEMENT_WITH_ITSELF
* Format code
* Use `STR_ERR_CANT_CHANGE_PARK_ENTRANCE_FEE` in title
* Format code using Github web editor
* Format indentation
