KDE: Update KDE Plasma to 6.5.0

Announcement: https://kde.org/announcements/plasma/6/6.5.0/

Caution!!
This update breaks Plasma Wayland for FreeBSD users. Do not upgrade
(or switch to the quarterly packages) if you prefer Wayland session.

Ports changes:

Add new Plasma port:

• sysutils/plasma6-knighttime: helpers for scheduling the dark-light cycle.

kde.mk:

• Add knighttime to the Plasma components
• Update dependency entry for milou component

audio/plasma6-kpipewire:

• Remove stale patch

security/plasma6-ksshaskpass:

• Depend on KF6Doctools to generate man page

sysutils/plasma6-systemsettings:

• Drop unused dependency

x11/plasma6-plasma-workspace:

• Drop unused dependency
• Remove stale patch

x11-toolkits/plasma6-kdeplasma-addons:

• Demote plasma5support to a runtime dependency

x11-wm/plasma6-kwin:

• Fix patch to locate hwdata
• Xwayland is a runtime dependency
• Drop unused dependencies

x11-wm/plasma6-kwin-x11:

• Fix patch to locate hwdata