Document current component/feature maturity

[mjnagel]

Is your feature request related to a problem? Please describe.

Current docs are not clear on whether a given component of uds-core is fully implemented/utilized/stable. It would be helpful to see maturity of given components documented.

Similarly as we add operator features (such as SSO support, networkpolicies, etc) we will likely want to start some of these as "alpha" features, maybe even behind feature flags, and provide a table/list of all features and their current state.

Describe the solution you'd like

When I view the docs site I should see a maturity/status page listing operator features and components of core with clearly defined maturity levels for each.

Describe alternatives you've considered

This could be done per-component/feature rather than aggregated.

This could be captured in release notes rather than docs.