Document default paint attribute transitions

[1ec5]

On each style layer property representing an attribute transition, the documentation comment should indicate the default transition value (duration and delay). For example, #9256 changes the default duration to match the style specification, but this change isn’t reflected in the documentation.

/cc @jfirebaugh @fabian-guerra

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.