ci: build ISO from generated desktop dish via make all

- both ISO workflows run the new single 'make all' pipeline (they
  previously referenced the removed recipe-generator/ directory and
  nonexistent live kickstarts) and build from the generated
  desktop_43_standard_grub_gnome_guest-agents dish
- README: document the data-driven cooking pipeline (manifest +
  templates + make all), generated build products, and updated
  deploy/dish examples

.gitea/workflows/build-iso_more-recent.yaml

@@ -7,7 +7,7 @@ on:
 
 env:
   FEDORA_VERSION: 43
-  KICKSTART_FILE: live-desktop-hypervisor
+  KICKSTART_FILE: desktop_43_standard_grub_gnome_guest-agents
 
 jobs:
   checkout:
@@ -29,6 +29,11 @@ jobs:
         run: |
           mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --install lorax-lmc-novirt vim-minimal pykickstart livecd-tools
 
+      - name: Generate dishes
+        run: |
+          cd cook
+          make all
+
       - name: Copy configuration file to mock
         run: |
           mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --copyin dishes/${{ env.KICKSTART_FILE }} /builddir