Add a reset command to undo all the UI and reset everything

autoload/vimspector.vim

@@ -19,16 +19,18 @@ let s:save_cpo = &cpo
 set cpo&vim
 " }}}
 
-  py3 << EOF
-from vimspector import debug_session
-_vimspector_session = debug_session.DebugSession()
-EOF
+
+call vimspector#internal#state#Reset()
 
 " TODO: Test function
 function! vimspector#Launch() abort
   py3 _vimspector_session.Start()
 endfunction
 
+function! vimspector#Reset() abort
+  py3 _vimspector_session.Reset()
+endfunction
+
 function! vimspector#Restart() abort
   py3 _vimspector_session.Restart()
 endfunction