Onboarding issues

[HenryLHH]

你好，纯rust和flutter小白... 用pip来安装raysystem的package、以及flutter和其它dependencies后，存在如下问题：

1. main.py也可以正常运行（但是每次command如ddg smolagent后文件输出路径找不到对应文件）
2. flutter run -d chrome可以启动对应的GUI, 但是除了时钟等应用，OCR、咨询助手等模块都没有response。
3. 直接启动ddg.py时有一些SQLite的报错：

DuckDuckGo crawler task executed at 1740812699.593123
Traceback (most recent call last):
  File "/path/to/RaySystem/raysystem/module/crawler/ddg/ddg.py", line 50, in <module>
    asyncio.run(ddg_crawler_task(query="machine learning"))
  File "/path/to/env/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/path/to/env/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/path/to/RaySystem/raysystem/module/crawler/ddg/ddg.py", line 19, in ddg_crawler_task
    existed = await info_is_info_exists_by_url(result['href'])
  File "/path/to/RaySystem/raysystem/module/info/info.py", line 77, in info_is_info_exists_by_url
    result = await session.execute(select(Info).where(Info.url == url))
  File "/path/to/env/lib/python3.10/site-packages/sqlalchemy/ext/asyncio/session.py", line 463, in execute
    result = await greenlet_spawn(
  File "/path/to/env/lib/python3.10/site-packages/sqlalchemy/util/_concurrency_py3k.py", line 190, in greenlet_spawn
    result = context.switch(*args, **kwargs)
  File "/path/to/env/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 2365, in execute
    return self._execute_internal(
  File "/path/to/env/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 2239, in _execute_internal
    bind = self.get_bind(**bind_arguments)
  File "/path/to/env/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 2845, in get_bind
    raise sa_exc.UnboundExecutionError(
sqlalchemy.exc.UnboundExecutionError: Could not locate a bind configured on mapper Mapper[Info(info)], SQL expression or this Session.

如果可以在README里加一些onboarding的基础指令就更好啦，感恩！