feat: added the namespace option to the publish command

[dimtrovich]

Description
This option allows you to run only Publishers of a specific namespace

The namespace option is used to define the namespace from which to search for publishers. This not only limits the files to be scanned but also prevents a publisher from being reexecuted.
If a library has misconfigured its publisher, reexecution may result in a file being replaced, for example a configuration file of library.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[ddevsr]

The new option unaccepted in develop, send to branch 4.6

[michalsn]

Please rebase with the 4.6 branch: https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/workflow.md#if-you-sent-to-the-wrong-branch

Commits should be signed: https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/workflow.md#gpg-signing-old-commits
We will also need an updated user guide and changelog entry.

[michalsn]

Your first commit also needs to be signed.

Please add a changelog entry under the Enhancements section: https://github.com/codeigniter4/CodeIgniter4/blob/4.6/user_guide_src/source/changelogs/v4.6.0.rst
A short description is enough.

[michalsn]

It looks like a small fix is needed in the user guide.