[REF] Refactor

app/schema/library/library.py

@@ -0,0 +1,29 @@
+from typing import List
+from typing import Optional
+from sqlalchemy import String
+from sqlalchemy.orm import Mapped
+from sqlalchemy.orm import mapped_column
+from sqlalchemy.orm import relationship
+
+from .base import Base
+
+class Library(Base):
+    __tablename__ = "library"
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String(255))
+    notes: Mapped[str] = mapped_column(String(65656))
+    
+    envs: Mapped[List["Env"]] = relationship(
+        back_populates="library", cascade="all, delete-orphan"
+    )
+
+    paths: Mapped[List["Path"]] = relationship(
+        back_populates="library", cascade="all, delete-orphan"
+    )
+
+    books: Mapped[List["Book"]] = relationship(
+        back_populates="library", cascade="all, delete-orphan"
+    )
+
+    def __repr__(self) -> str:
+        return f"Library(id={self.id!r}, name={self.name!r}, notes={self.notes!r}"