fix: 预检查收藏夹内容类型，支持写入 nfo

nfo.py

@@ -0,0 +1,47 @@
+from dataclasses import dataclass
+import datetime
+from pathlib import Path
+
+
+@dataclass
+class Actor:
+    name: str
+
+    def to_xml(self) -> str:
+        return f"""
+    <actor>
+        <name>{self.name}</name>
+    </actor>
+""".strip(
+            "\n"
+        )
+
+
+@dataclass
+class EpisodeInfo:
+    title: str
+    plot: str
+    actor: list[Actor]
+    bvid: str
+    aired: datetime.datetime
+
+    def write_nfo(self, path: Path) -> None:
+        with path.open("w", encoding="utf-8") as f:
+            f.write(self.to_xml())
+
+    def to_xml(self) -> str:
+        actor = "\n".join(_.to_xml() for _ in self.actor)
+        return f"""
+<?xml version="1.0" encoding="utf-8" standalone="yes"?>
+<episodedetails>
+    <plot><![CDATA[{self.plot}]]></plot>
+    <outline />
+    <title>{self.title}</title>
+{actor}
+    <year>{self.aired.year}</year>
+    <uniqueid type="bilibili">{self.bvid}</uniqueid>
+    <aired>{self.aired.strftime("%Y-%m-%d")}</aired>
+</episodedetails>
+""".strip(
+            "\n"
+        )