Landing Page: Update Getting started page with Devfile Ecosystem section

[kim-tsao]

Which area this feature is related to?

/area landing-page

Which functionality do you think we should add?

Why is this needed? Is your feature request related to a problem?

Detailed description:

Describe devfile creation, sharing, and consumption flows

Describe the solution you'd like

Getting started page contains the personas. Devfile Ecosystem section should help tie things together

Describe alternatives you've considered

Additional context