Add Teams, disable Ferdium, refactor Hyprland

Enable teams-for-linux and disable ferdium in system modules; add both
to core packages. Simplify Hyprland configuration by using direct
settings for animations, window rules, env, exec‑once and hypridle.
Remove unused Microsoft Teams PWA entry.

modules/core/packages/packages.nix

@@ -47,6 +47,8 @@
     bottles = bottles;
     heroic = heroic;
     adb = android-tools;
+    teams = teams-for-linux;
+    ferdium = ferdium;
   };
 in {
   imports = builtins.attrValues (builtins.mapAttrs mkPackage packages);