support unit instance mocking

Also prioritises the dispatching of unit instances, now that the preferred way of running units is with the new PHP syntax specifying the arguments by name.

remove "mixed" param hinting in run

remove unused class from stub

add social links to readme

use container instead of a singleton for UnitMockRegistry

Merge branch 'main' of github.com:lucid-architecture/lucid into main

revert to generating feature tests in tests/Feature directory

Merge pull request #22 from Batisska/@andrianov/in_microservice_chang…

…ed_the_migration_path

in microservice changed the migration path

update workflow to use new commands test script

fix locating source directory and determining project variant

fixes #1
thanks to @undijke