Swift declarations now follow the order of the implementation (.m) file [Jan 26]

Before our recent changes, the Swift output followed the order of the header (.h) file.

Private declarations (present only in the implementation file) appeared at the end of the Swift output.

A few of our users suggested revising this behavior since the implementation (.m) file is considered more important to follow than the header (.h) file.

Now the Swift output is structured as follows:

• Declarations present in the .h file only (but not in the .m file) are listed first.
• Declarations from the .m file are listed afterward, preserving the original ordering.

See this GitHub issue for the details and rationale.