Website: Add blog post for 16.0.0 (#500)

Co-authored-by: David Li <[email protected]>
Co-authored-by: Curt Hagenlocher <[email protected]>
Co-authored-by: Matt Topol <[email protected]>
Co-authored-by: Alenka Frim <[email protected]>
Co-authored-by: Dane Pitkin <[email protected]>
Co-authored-by: Bryce Mecum <[email protected]>
Co-authored-by: Sutou Kouhei <[email protected]>