rename campaign packages to use -fourier suffix

Stock-replacing pkgnames (kwin, qt6-base) hid the campaign carry from
'yay -Sl | grep fouri'. Renamed to -fourier suffix everywhere, with
conflicts/provides/replaces so existing stock installs auto-migrate
on next pacman -Syu. Pkgrel bumped on each.

  kwin                       -> kwin-fourier
  qt6-base                   -> qt6-base-fourier
  qt6-xcb-private-headers    -> qt6-xcb-private-headers-fourier
  ffmpeg-v4l2-request-git    -> ffmpeg-v4l2-request-fourier
  vulkan-panfrost            -> vulkan-panfrost-fourier

arch/kwin-fourier/PKGBUILD

@@ -20,10 +20,10 @@
 # directly without exporting an extra sync_file). See
 # ../chromium-fourier/KWIN_PIVOT.md for the full diagnosis thread.
 
-pkgname=kwin
+pkgname=kwin-fourier
 pkgver=6.6.4
 _dirver=$(echo $pkgver | cut -d. -f1-3)
-pkgrel=2
+pkgrel=3
 epoch=1
 arch=(aarch64 x86_64)
 url='https://kde.org/plasma-desktop/'
@@ -97,6 +97,9 @@ makedepends=(extra-cmake-modules
              xorg-xwayland)
 optdepends=('plasma-keyboard: virtual keyboard')
 groups=(plasma)
+provides=(kwin)
+conflicts=(kwin)
+replaces=(kwin)
 source=(https://download.kde.org/stable/plasma/$_dirver/$pkgname-$pkgver.tar.xz{,.sig}
         0001-transaction-bypass-watchDmaBuf-fence-wait.patch)
 sha256sums=('3f9439760580a977d018daf4b35b62e5a1700def7b21c8dfbfc789d21378d7ad'