### What problem does this PR solve?
Update icons for docs.
Trailing spaces are auto truncated by the editor, does not affect real
content.
### Type of change
- [x] Documentation Update
### What problem does this PR solve?
update for 'list configs' and 'list envs'
### Type of change
- [x] Documentation Update
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
Refactor setting type
### Type of change
- [x] Refactoring
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
`SHOW VERSION;`
- Display the current RAGFlow version.
`GRANT ADMIN <username>`
- Grant administrator privileges to the specified user.
`REVOKE ADMIN <username>`
- Revoke administrator privileges from the specified user.
`LIST VARS`
- List all system configurations and settings.
`SHOW VAR <var_name>`
- Display the content of a specific system configuration/setting by its
name or name prefix.
`SET VAR <var_name> <var_value>`
- Set the value for a specified configuration item.
related to: #12409
### Type of change
- [x] Documentation Update
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
