Feature: #108846 - Console command to inspect global ViewHelper namespaces 

See forge#108846

Description 

The new console command typo3 fluid:namespaces has been introduced. It lists all the available global ViewHelper namespaces in the current project and can be used to verify the current configuration. The --json option can be used to access the information in a machine-readable way.

Usage:

vendor/bin/typo3 fluid:namespaces
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Example output:

+--------+------------------------------+
| Alias  | Namespace(s)                 |
+--------+------------------------------+
| core   | TYPO3\CMS\Core\ViewHelpers   |
+--------+------------------------------+
| formvh | TYPO3\CMS\Form\ViewHelpers   |
+--------+------------------------------+
| f      | TYPO3Fluid\Fluid\ViewHelpers |
|        | TYPO3\CMS\Fluid\ViewHelpers  |
+--------+------------------------------+
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The same information is available in the System > Configuration module in the TYPO3 backend.

Impact 

The new console command allows developers and integrators to inspect global ViewHelper namespaces in the current project.