Add GET endpoint for /trees

endpoints/trees.get.py

@@ -0,0 +1,12 @@
+# Entity: Tree
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from app.api.db.database import get_db
+
+router = APIRouter()
+
+@router.get("/trees", status_code=200, response_model=List[TreeSchema])
+async def get_trees(db: Session = Depends(get_db)):
+    trees = db.query(Tree).all()
+    return trees