refactor: split parse into multiple files

Signed-off-by: Konstantin Fickel <mail@konstantinfickel.de>

src/streamer/parse/shard.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+from typing import Optional
+from pydantic import BaseModel
+
+
+class Shard(BaseModel):
+    markers: list[str] = []
+    tags: list[str] = []
+    start_line: int
+    end_line: int
+    children: list[Shard] = []
+
+
+class StreamFile(BaseModel):
+    filename: str
+    shard: Optional[Shard] = None
+
+
+__all__ = ["Shard", "StreamFile"]