feat(plugin): support local plugin sources

app/core/config.py

@@ -417,6 +417,8 @@ class ConfigModel(BaseModel):
     PLUGIN_STATISTIC_SHARE: bool = True
     # 是否开启插件热加载
     PLUGIN_AUTO_RELOAD: bool = False
+    # 本地插件仓库目录，多个地址使用,分隔
+    PLUGIN_LOCAL_PATHS: Optional[str] = None
 
     # ==================== Github & PIP ====================
     # Github token，提高请求api限流阈值 ghp_****