option to show installed packages in search

neb/src/search.py

@@ -1,4 +1,4 @@
-from .util import get_package_index
+from .util import get_package_index, installed_libs
 from .console import console
 
 from rich.table import Table
@@ -7,8 +7,9 @@ from rich.box import ROUNDED
 
 def search(args):
     index = get_package_index()
+    installed = installed_libs()
     
-    matching_keys = [key for key in index if args.query in key]
+    matching_keys = [key for key in index if args.query in key and not (not args.show_installed and key in installed)]
     
     if args.limit >= 0:
         matching_keys = matching_keys[:args.limit]