The uid example was missing documentation. This commit adds complete
documentation including:
- Command syntax and options
- Synopsis explaining the tool's purpose
- Options table with all available flags
- Usage examples for each query type:
- Query user by ID (-uid)
- Query user by name (-uname)
- Query group by ID (-gid)
- Query group by name (-gname)
- Help display example
- Configuration options
The documentation is based on the actual source code in
apps/examples/uid/uid_main.c.
Signed-off-by: hanzj <hanzjian@zepp.com>
