refactoring, added phpunit, laminas coding standard, psalm and tests

[pinclau]

No description provided.

[alexmerlin]

Couple of issues to be addressed across the library:

1. All file header blocks should be removed:

/**

• @see https://github.com/dotkernel/dot-twigrenderer/ for the canonical source repository
  */

2. Creating a mock instance usually throws an exception. Check the test files and see where the IDE suggests to Add PHPDoc comment with throws tags.
3. Add return type hint void to your tests where missing.
4. Any specific reason for using static assertion methods instead their objectual equivalent? For consistency, unless necessary, we should always use $this->asssert*
5. If you are mocking objects in the setUp method, you should store them in a property with wider type hinting (by adding MockObject too) as you did with some tests, for example:
   private ContainerInterface|MockObject $container;
   because right now, when calling methods on the property that should hold the instance, the IDE complains that it could be undefined.
   Alternatively, you can create new instances with each test.
6. Please add return type hints where missing (including untouched code in src)
7. Please add tests for Laminas/View/HelperPluginManagerFactory

[alexmerlin]

Also, please update README.md file:

• Add Symfony Insight and static analysis badges (see one of the recently updated libraries on how and where to add them)
• In preparation for a 3.4.0 release, please replace on the line with PHP from Packagist the string 3.2.0 with 3.4.0
• On the line with GitHub license please replace the string 3.2.0 with 3.0

[alexmerlin]

Don't forget to add Gihub actions files as well.