Add screen-recorder plugin; refactor Affinity

Introduce a new screen‑recorder plugin with default settings, key
bindings,
and a bar widget entry. Add a dedicated Affinity module, import it in
the
core defaults, and remove the previous package entry. Enable Affinity on
the Garand‑Desktop and Garand‑Laptop hosts while keeping it disabled on
the
default host. Update flake.lock to newer revisions and reorder the
hyprland exec‑once commands.

modules/home/hyprland/binds.nix

@@ -21,6 +21,7 @@
     "SUPER, N, exec, dex ${desktopEntriesPath}/garandcloud.desktop #\"GarandCloud client\""
     "SUPER, O, exec, onlyoffice-desktopeditors #\"Office suite\""
     "SUPER, P, exec, plex-desktop #\"Plex media player\""
+    "SUPER, R, exec, noctalia-shell ipc call plugin:screen-recorder saveReplay #\"Save Replay\""
     "SUPER, Return, exec, kitty #\"Kitty terminal\""
     "SUPER, S, exec, steam #\"Steam Game launcher\""
     "SUPER, T, exec, thunar #\"File manager\""
@@ -51,6 +52,7 @@
     "SUPER ALT, G, exec, dex ${desktopEntriesPath}/glance.desktop #\"Glance server panel\""
     "SUPER ALT, M, exec, dex ${desktopEntriesPath}/mastodon.desktop #\"Mastodon social network client\""
     "SUPER ALT, P, exec, noctalia-shell ipc call settings toggle #\"Open settings panel\""
+    "SUPER ALT, R, exec, noctalia-shell ipc call plugin:screen-recorder toggleReplay #\"Toggle Replay\""
     "SUPER ALT, S, exec, slack #\"Slack team communication tool\""
     "SUPER ALT, T, exec, gedit #\"GNOME text editor\""
     "SUPER ALT, W, exec, noctalia-shell ipc call wallpaper toggle #\"Toggle wallpaper\""