Mosa.DeviceDriver: code style refactoring

[AnErrupTion]

This PR focuses on refactoring the code style throughout the project. The following changes were done, wherever possible:

• Fold functions into expression bodies (one line)
• Put expression body arrow on the previous line if it's split in multiple
• Make protected and internal structs, fields and functions private (and those were appropriately renamed to fit naming conventions)
• Fields were made readonly
• Enums were unfolded into multiple lines
• Braces of single line blocks were removed
• Braces of empty blocks were put onto the same line as the statement/expression
• The "var" type inference was used for defining variables
• Some commented code was removed (mostly debug printing code)
• A space was prepended to the contents of comments explaining something, whereas spaces were removed (if any) if the comments only redirected to a link
• Pattern matching was used
• Functions, fields, function arguments and variables were renamed if they had redundant naming (e.g. ISABus: StartISADevices() => StartDevices())
• Redundant else branches and returns were removed
• Comments containing reference links for drivers were moved after the namespace declaration
• Conditions were inverted to reduce nesting
• Conditions were transformed into switch statements where appropriate
• Switch expressions were used instead of switch statements

Additionally, the following specific changes were done:

• IDEController:
  • DrivesPerConroller => DrivesPerController
  • MaximumDriveCount was moved inside the IDiskControllerInterface region for consistency
• PCIController:
  • region "IPCIController" => "IPCIControllerLegacy"
  • region "IPCIController v2" => "IPCIController"