beginner must read: add more desc about taskmanager log and spark conf

beginner should know:
- show joblog and where is taskmanager log
- all components log, could be a link
- https://openmldb.ai/docs/zh/main/quickstart/function_boundary.html?highlight=spark%20default%20conf#taskmanager how to set taskmanager/spark conf

P.S. a problem `LauncherServer.acceptConnections` throw exception
```
SEVERE: Error in accept loop
java.net.SocketTimeoutException: Accept timed out
```

The issue points to existing documentation at https://openmldb.ai/docs/zh/main/quickstart/function_boundary.html. Start by locating the documentation source files in the repository, likely under a 'docs' directory. Examine the referenced section about taskmanager and spark configuration. The goal is to add clearer descriptions about job logs, taskmanager log locations, and how to set configurations. Verify the changes by building or previewing the documentation locally.

索引モデルが issue の本文から書いたものです。