Implemented #162474.

There all five context menu items added:

1. Copy
   • Copy the name of the function

      setCallsDirection
     

2. Copy Hierarchy
   • Copy the hierarchy with symbol type and location

     setCallsDirection (Function @ src/calls/index.ts)
       > register (Function @ src/calls/index.ts)
         > activate (Function @ src/extension.ts)
     

3. Copy Hierarchy (Reversed)
   • Copy the hierarchy with symbol type and location in a reversed direction

     activate (Function @ src/extension.ts)
       > register (Function @ src/calls/index.ts)
         > setCallsDirection (Function @ src/calls/index.ts)
     

4. Copy Hierarchy (Short)
   • Copy the hierarchy with the name only

     setCallsDirection
       > register
         > activate
     

5. Copy Hierarchy (Reversed, Short)
   • Copy the hierarchy with the name only in a reversed direction

     activate
       > register
         > setCallsDirection
     

Limitation:
The current implementation only considers the ancestors of the selection item.