fix: tilføj Flathub remote og ret pakkelister

- Tilføj Flathub remote-task inden Flatpak-install (manglede på ny installation)
- Ret nvim → neovim og fjern mangojuice fra DNF i vars og manual guide
- Tilføj mangojuice som Flatpak (io.github.radiolamp.mangojuice)
- Opdater README og fedora-kde-setup med Flathub-trin

fedora-kde-setup.md

@@ -140,13 +140,21 @@ EOF
 #### DNF
 
 ```bash
-sudo dnf install fastfetch stow fish kitty lsd glow tailscale steam git gh nvim tldr btop 1password sublime-text mangojuice gamemode gamescope obs-studio jotta-cli codium rpmconf Cider
+sudo dnf install fastfetch stow fish kitty lsd glow tailscale steam git gh neovim tldr btop 1password sublime-text gamemode gamescope obs-studio jotta-cli codium rpmconf Cider
 ```
 
 #### Flatpak
 
+Tilføj først Flathub som remote:
+
 ```bash
-flatpak install -y \
+flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
+```
+
+Installer derefter pakker:
+
+```bash
+flatpak install -y flathub \
   com.discordapp.Discord \
   io.github.Faugus.faugus-launcher \
   com.adamcake.Bolt \
@@ -158,7 +166,8 @@ flatpak install -y \
   com.github.Matoking.protontricks \
   com.vysp3r.ProtonPlus \
   org.musicbrainz.Picard \
-  io.github.lullabyX.sone
+  io.github.lullabyX.sone \
+  io.github.radiolamp.mangojuice
 ```
 
 ### Dotfiles