`Public Functions` header shouldn't be output if there are only private functions

[alexjfisher]

Describe the Bug

Public Functions header shouldn't be output if there are only private functions

Expected Behavior

When a function is marked as @api private it appears under a Private Functions header instead of the generic Functions header. If there are no public functions, the Public Functions header should be omitted.

See example and conversation here.

[danielparks]

This is also true for private resource types, and possibly other things as well.

[danielparks]

PR #314 submitted.

[danielparks]

Should be fixed now in main!