BC BREAK: removed Scanner component, removed FileReflection, removed NameInformation and made DocBlockScanner @internal

[Ocramius]

The scanners were full of incomplete, untested and generally experimental code that would simply
crash when presented with something like PHP 8 code.

In addition to that, they were extremely unmaintainable due to the code being written for PHP 5,
and never being touched afterwards (too complex).

In order to slim down things and keep maintenance cost low, the complete Laminas\Code\Scanner
component has been trashed, with the exception of Laminas\Code\Scanner\DocBlockScanner, which
is still used in in some reflection internals.

It is advised for end-users to move to more modern tooling, such as roave/better-reflection
which provides a safer (and well tested) API to scan source directories and extract reflection
information without loading any potentially dangerous PHP files.

The following components have been removed from the public API:

• Laminas\Code\Scanner\*
• Laminas\Code\NameInformation (unused in this package)
• Laminas\Code\Reflection\FileReflection (use roave/better-reflection instead)
• Laminas\Code\Generic\Prototype\*, which contains utilities to define custom docblock types:
  please consider using something like https://github.com/phpDocumentor/ReflectionDocBlock instead.

Q	A
Documentation	no
Bugfix	yes
BC Break	yes
New Feature	no
RFC	yes
QA	no

TODOs:

• write CHANGELOG.md entry (992c26e)
• check that documentation does not contain any scanner component references ( BC BREAK: removed Scanner component, removed FileReflection, removed NameInformation and made DocBlockScanner @internal #58 (review) )

[Ocramius]

Also here: BEFORE merging, we need Github Actions to actually run on the codebase.

I went way overtime with this, but my aim is to do that Wednesday after work.

[weierophinney]

🚢

I've checked the documentation and README.md file, and there are no mentions at all of scanning, so I think with a CHANGELOG.md entry, you're good to go.