Test/improve ECS @component support for type parameters

[heyx3]

• Test a child component happening to use the same type-param name as its parent, for a different purpose. The child should not be affected by the parent's type param name.
• Test that a child can have smaller and larger parameter type restrictions in its @promises and @configurables, than its parent implementation. Effectively extending or specializing the parent behavior.
• Test generic requirements, like { require: C{I} }