Reintroduce @CommandHandlerInterceptor support

[CodeDrivenMitch]

Feature Description

Due to a wrong abstraction the @CommandHandlerInterceptor has been temporarily removed. We should re-add this at the next convenience.

Acceptance criteria:

• Handler method of an aggregate which match the requirements of ione or more @CommandHandlerInterceptor methods should display an interception icon in the gutter, that shows a list of matching interceptors on click
• @CommandHandlerInterceptor methods should display an interceptor icon that shows a list of intercepted method handlers
• All follow the normal matching rules, based on message type, aggregate hierarchy and payload