Use Koowa::isDebug check for debugging

[github-actions]

Closes #534

• When Koowa::isDebug is true (KOOWA_DEBUG environment variable is set) catch everything
• When Joomla debug is on catch errors and all uncaught exceptions
• Otherwise, do nothing

1. Koowa debug enabled (by setting the KOOWA_DEBUG environment variable)

• If KOOWA_DEBUG is enabled assume we are in local development mode
• • error types : TYPE_ALL which will trigger an exception for : exceptions, errors and failures
• • error levels : ERROR_DEVELOPMENT (E_ALL | E_STRICT | ~E_DEPRECATED)

2. Joomla debug enabled

• If debug is enabled assume we are in none local debug mode
• • error types : TYPE_ALL which will trigger an exception for : exceptions, errors and failures
• • error levels : E_ERROR and E_PARSE

3. Debug disabled

• Do not try to trigger errors or exceptions automatically. To trigger an exception the implementing code
• should call {@link handleException()}

[johanjanssens]

Good work!