feat(server,web) Semantic import path validation (#7076)

* add library validation api

* chore: open api

* show warning i UI

* add flex row

* fix e2e

* tests

* fix tests

* enforce path validation

* enforce validation on refresh

* return 400 on bad import path

* add limits to import paths

* set response code to 200

* fix e2e

* fix lint

* fix test

* restore e2e folder

* fix import

* use startsWith

* icon color

* notify user of failed validation

* add parent div to validation

* add docs to the import validation

* improve library troubleshooting docs

* fix button alignment

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/openapi/test/validate_library_response_dto_test.dart

@@ -0,0 +1,27 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for ValidateLibraryResponseDto
+void main() {
+  // final instance = ValidateLibraryResponseDto();
+
+  group('test ValidateLibraryResponseDto', () {
+    // List<ValidateLibraryImportPathResponseDto> importPaths (default value: const [])
+    test('to test the property `importPaths`', () async {
+      // TODO
+    });
+
+
+  });
+
+}