devel/bsddialog: update to 0.3

New features overview:

• Unicode. User interface handles multi-column characters. API can handle char* like a multibyte character string. Internally wide characters are used for keyboard input, to adapt word wrapping and dynamic text auto-sizing for multi-column characters.
• Forms refactoring. Complete rewrite deleting libformw dependency.
• Theme. New utility options to save and load custom theme at run-time.
• TUI navigation. Added keys to navigate input components. Changed default focus behavior of input dialogs to be LGPL-dialog-like; a new option can set the previous whiptail-like behavior.

Change port maintainership

ChangeLog: https://gitlab.com/alfix/bsddialog/-/raw/main/CHANGELOG

PR: 266131
Approved by: bapt