feat: 린트 추가

일단 자주 사용하는 lint 를 추가해보았습니다. 후에 필요하면 또 추가하면 될 것 같습니다

resolve: #2

front/analysis_options.yaml

@@ -22,8 +22,30 @@ linter:
   # `// ignore_for_file: name_of_lint` syntax on the line or in the file
   # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-
+    - prefer_const_constructors
+    - always_declare_return_types
+    - always_require_non_null_named_parameters
+    - avoid_types_on_closure_parameters
+    - avoid_annotating_with_dynamic
+    - avoid_escaping_inner_quotes
+    - avoid_function_literals_in_foreach_calls
+    - avoid_private_typedef_functions
+    - combinators_ordering
+    - curly_braces_in_flow_control_structures
+    - omit_local_variable_types
+    - annotate_overrides
+    - sort_constructors_first
+    - unawaited_futures
+    - directives_ordering
+    - unnecessary_final
+    - unnecessary_parenthesis
+    - conditional_uri_does_not_exist
+    - prefer_single_quotes
+    - await_only_futures
+    - always_use_package_imports
+    - avoid_empty_else
+    - comment_references
+    - prefer_void_to_null
+    - use_key_in_widget_constructors
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options