CFE-4667: Improve error message from cfbs about illegal characters in module names

[sarakthon]

Ticket: CFE-4667

I made some test modules to verify and test the suggested name fixes, e.g. "name": "MY.MoDuLe.test_123" and module_TEST:

Command and output before changes:

% cfbs add https://github.com/sarakthon/module-example.test.git     
Error: Error in cfbs.json for module 'MY.MoDuLe.test_123': Module name must start with a lowercase ASCII letter ('MY.MoDuLe.test_123' starts with 'M')

% cfbs add https://github.com/sarakthon/module-example.test.git
Error: Error in cfbs.json for module 'module_TEST': Module name contains illegal characters (only lowercase ASCII alphanumeric characters and single dash separators are allowed)

Command and output after changes:

% cfbs add https://github.com/sarakthon/module-example.test.git
Error: Error in cfbs.json for module 'MY.MoDuLe.test_123': Module name must start with a lowercase ASCII letter ('MY.MoDuLe.test_123' starts with 'M') Consider renaming it to 'my-module-test-123'.

% cfbs add https://github.com/sarakthon/module-example.test.git
Error: Error in cfbs.json for module 'module_TEST': Module name contains illegal characters (only lowercase ASCII alphanumeric characters and single dash separators are allowed) Consider renaming it to 'module-test'.

[cf-bottom]

Thank you for submitting a PR! Maybe @craigcomstock can review this?

[olehermanse]

👍