Rename "Implementation" stage to "Integration"

I want to suggest renaming the "implementation" stage of the component lifecycle to "integration". This is because:

• We often use the term "implementing" when we are talking about building components
• Implementing doesn't really reflect adding the component to gitlab
• When adding a component to gitlab, we are integrating it into the product

Thoughts? cc @pedroms @ealcantara @timzallmann @rverissimo