AQUA CLI: Improve handling error and Add new flags

[mingkang111]

Description

This PR aims to:

• provide the --verbose and --debug flag to set aqua logging level to INFO and DEBUG respectively.
• Improve CLI error handling: gracefully exit when encounter error.
• Improve CLI test

User experience

ads aqua model get <ocid> --verbose
ads aqua model get <ocid> --debug

If user provide two flags together, it will no proceed. e.g.:

ads aqua model get <ocid> --debug --verbose

>>> ERROR:ads:Cannot use `--debug` and `--verbose` at the same time. Please select either `--debug` for `DEBUG` level logging or `--verbose` for `INFO` level logging.

Priority betweem --verbose/--debug and --log-level

When user explicitly use --verbose/--debug flag, CLI will take the flag to set the logging level. --log-level can be use without --verbose/--debug.

Test

Future work

Define exit_code for each AquaError. We need to have a table to show the mapping for AquaError with Http status code and cli exit code.