Debugger: Started DebuggerIntf package / package link

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44077 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: added DebuggerIntf 

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44078 4005530d-fff6-0310-9dd1-cebe43e6787f