add: markdown permission setting

improve: template

db/models/MarkdownPermissionSetting.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, ForeignKey, String
+
+from db.models import Base
+
+
+class MarkdownPermissionSetting(Base):
+    __tablename__ = 'markdown_permission_setting'
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    permission = Column(String(255), nullable=True)
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "permission": self.permission,
+        }