Develop plugin declaration types inspections

[bohdan-harniuk]

We should have plugin declaration types inspections:

<type name="Foo\Bar\Block\Order\TestA">
        <plugin name="foo_bar_do_smth_with_test_a" type="Foo\Bar2\Plugin\Block\Order\TestAPlugin"/>
</type>

For example, above we have the declared classes:

1. Foo\Bar\Block\Order\TestA
2. Foo\Bar2\Plugin\Block\Order\TestAPlugin

What if some of them have a typo?
We need to cover this inspection to show if any of these classes don't exist.

[m2-assistant]

Hi @bohdan-harniuk. Thank you for your report.
To help us process this issue please make sure that you provided sufficient information.

Please, add a comment to assign the issue: @magento I am working on this

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[Iamwade]

@magento I am working on this