[5.4] cli error/help message

[brianteeman]

Summary of Changes

Improve error message with helpful information

Testing Instructions

When Joomla is not installed (there is no configuration.php) and you try to run the cli commands php cli/joomla.php you get a message that you need to install Joomla to use the CLI

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[richard67]

I have tested this item ✅ successfully on 2687326

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46259.}

[richard67]

Setting the "bug" label as it is not really a new feature.

[tecpromotion]

I have tested this item ✅ successfully on 2687326

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46259.}

[tecpromotion]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46259.}

[muhme]

✅ Final test before merge with unzipped nightly build: One-line message seen before

• Test with PR full package unzipped: Three-line messages with command (command works with copy&paste)

[muhme]

Thank you @brianteeman for your contribution. Thank you @tecpromotion and @richard67 for testing.