Exit status commad with appropriate message if no requirements are found

[lfvJonas]

Feature Request

Description

When running the status command on a project that does not contain any requirements you get a IndexError: list index out of range exception. It's hard to decypher what has gone wrong with this error. It would be preferred to get a message like No requirements found instead.

Current Behavior

reqstool version: 0.3.1

1. Create this requirements.yml:

   metadata:
   urn: test
   title: test
   variant: microservice

2. Run this command reqstool status local -p path/to/dir

3. You get the following error

   Traceback (most recent call last):
   File "/home/u70565/.local/bin/reqstool", line 8, in <module>
   sys.exit(main())
   File "/home/u70565/.local/lib/python3.10/site-packages/reqstool/command.py", line 227, in main
   exit_code = command.command_status(status_args=args)
   File "/home/u70565/.local/lib/python3.10/site-packages/reqstool/command.py", line 201, in command_status
   result = StatusCommand(location=initial_source)
   File "/home/u70565/.local/lib/python3.10/site-packages/reqstool/commands/status/status.py", line 18, in __init__
   self.result = self.__status_result()
   File "/home/u70565/.local/lib/python3.10/site-packages/reqstool/commands/status/status.py", line 25, in __status_result
   status = _status_table(stats_container=statistics)
   File "/home/u70565/.local/lib/python3.10/site-packages/reqstool/commands/status/status.py", line 64, in _status_table
   col_align = ["center"] * len(table_data[0])
   IndexError: list index out of range

[lfvmarcus]

Version 0.3.1 is quite old. I cannot reproduce it in the latest version (0.4.4). Is this still a problem?

[lfvJonas]

I still get this error message in 0.4.4 and I think there should be a more appropriate error message