Add methods to register filters and middlewares

[Abstract-X]

Description

PR adds public registration methods for filters and middlewares so that in addition to these methods:

dispatcher.filters_factory.bind(SomeFilter)
dispatcher.filters_factory.unbind(SomeFilter)
dispatcher.middleware.setup(SomeMiddleware())

...there were these:

dispatcher.bind_filter(SomeFilter)
dispatcher.unbind_filter(SomeFilter)
dispatcher.setup_middleware(SomeMiddleware())

Type of change

• Documentation (typos, code examples or any documentation update)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes