feat(deploy): generate dishes before deploy and fix dish selection

- deploy.sh now runs 'make all' in cook/ before deploying, since dishes
  are build products no longer tracked in git; failures show the make
  output and abort
- deploy-distro.sh selects dishes by the *guest-agents* marker (the new
  naming replaced the virtual* prefix) and uses --os-variant
  fedora-unknown instead of the stale fedora41 pin

deploy/deploy-distro.sh

@@ -142,7 +142,7 @@ fi
 echo "You selected: $uri"
 
 # Get a list of files in "dishes" directory
-mapfile -t dish_name < <(find "cook/dishes/" -maxdepth 1 -type f \( -name "virtual*" \) -printf "%f\n" | sed 's/\.[^.]*$//')
+mapfile -t dish_name < <(find "cook/dishes/" -maxdepth 1 -type f \( -name "*guest-agents*" \) -printf "%f\n" | sed 's/\.[^.]*$//')
 
 # Check if there are any files
 if [ ${#dish_name[@]} -eq 0 ]; then
@@ -191,7 +191,7 @@ fi
 # virt-install command with user-defined VM name
 virt-install \
     --connect "$uri" \
-    --os-variant fedora41 \
+    --os-variant fedora-unknown \
     --virt-type kvm \
     --arch x86_64 \
     --machine q35 \