Provides a set of interfaces for common debug commands.

## Package Specification

This package provides a set interfaces for common debug commands. A debug command represent a debugger function that can be enabled or disabled and executed. The debug platform provides actions corresponding to the common debug commands. The actions delegate to the command handler interfaces to determine enabled state and execute.

A debugger implementation can provide its own implementation of a command by implementing a command handler interface directly, or by registering an adapter that implements the command handler interface. The debug platform's actions update enabled state and execute based on the active debug context. The debug platform provides implementations of handlers for the common debug commands for debuggers that are an implementation of the standard debug model. For example, the debug platform registers an `IStepOverHandler` adapter for implementations of `IStep`.