feat: add fields, getters_setters, and constructors to widgets_order lint configuration (#336)

Co-authored-by: Illia Aihistov <illia.aihistov-us@solid.software>

Author: solid-illiaaihistov

lib/analysis_options.yaml

@@ -83,6 +83,9 @@ solid_lints:
         - constructors
         - methods
       widgets_order:
+        - fields
+        - getters_setters
+        - constructors
         - init_state_method
         - build_method
         - did_change_dependencies_method