Update KDE Frameworks to 5.31

* New port: x11-toolkits/kirigami2

PR:		216797
Exp-Run by:	antoine
Reviewed by:	rakuco, mat
Approved by:	rakuco (mentor)
Differential Revision:	https://reviews.freebsd.org/D9554

Update KDE Frameworks to 5.30.0

* Changelog: https://www.kde.org/announcements/kde-frameworks-5.30.0.php
* New framework: x11/kf5-kwayland

PR:		216345
Exp-run by:	antoine
Reviewed by:	rakuco
Approved by:	rakuco (mentor)
Differential Revision:	https://reviews.freebsd.org/D9271

Update KDE Frameworks to 5.29.0

Release notes: https://www.kde.org/announcements/kde-frameworks-5.29.0.php

New ports:
* textproc/kf5-syntax-highlighting (new in 5.28.0)
* graphics/kf5-prison (new in 5.29.0)

Fixes:
* kf5-kservice: Move applications.menu to kf5-applications.menu to stop
conflicting with kdelibs4.
* Define conflicts in the kde4-l10n ports (debian does the same).
* kf5-kapidox: Fix with python3

Thanks to Matthew Rezny <matthew@reztek.cz> for looking at the conflicts in
214528,
and Dima Panov (fluffy@) for the python3 fix.

PR:     214528
Reviewed by:    rakuco, mat
Approved by:    rakuco (mentor)
Differential Revision:  https://reviews.freebsd.org/D8776

Importing KDE Frameworks into the ports tree (required for newer KDE Desktop and
Applications)

KDE Frameworks is a collection of libraries and software frameworks by KDE
that serve as technological foundation for KDE Plasma 5 and KDE Applications
distributed under the GNU Lesser General Public License (LGPL) [1].

The work is based on what we have in the KDE testing repo [2].

This is the next big step in updating the KDE Desktop and its Applications
to anything less dusty.

With this change, `USES=kde:5` is now a valid option. Ports that need to depend
on KDE Framework can now set:
	USES=kde:5
	USE_KDE=<framework1> <framework2> ... <frameworkX>