feat(cses): update cses with concept of a category

scrapers/models.py

@@ -13,6 +13,13 @@ class ProblemSummary:
     name: str
 
 
+@dataclass
+class ContestSummary:
+    id: str
+    name: str
+    display_name: str
+
+
 @dataclass
 class ScrapingResult:
     success: bool
@@ -26,6 +33,11 @@ class MetadataResult(ScrapingResult):
     categories: dict[str, list[ProblemSummary]] = field(default_factory=dict)
 
 
+@dataclass
+class ContestListResult(ScrapingResult):
+    contests: list[ContestSummary] = field(default_factory=list)
+
+
 @dataclass
 class TestsResult(ScrapingResult):
     problem_id: str