dart: stop ignoring *.config.dart by default

The pattern targets injectable's generated injection.config.dart, but
hand-written files such as app.config.dart are common and were silently
excluded. Dropping one generated file's noise is not worth losing user
code; users can still exclude it explicitly.

Author: anhnh2002

codewiki/src/be/dependency_analyzer/utils/patterns.py

@@ -58,7 +58,6 @@
     "*.gr.dart",
     "*.mocks.dart",
     "*.gen.dart",
-    "*.config.dart",
     "*.pb.dart",
     "*.pbenum.dart",
     "*.pbjson.dart",