Remove shell VM launchers in favor of the Python ones

Delete run-*.sh and point the documentation at run-*.py. The
seediso build-seed.sh helpers stay, as the Python launchers call them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HL6bzSwWGNwru9bDS9ZCLg

seediso/almalinux10/README.md

@@ -1,7 +1,7 @@
 # AlmaLinux 10 seed.iso
 
 This directory contains the cloud-init NoCloud configuration used by
-`run-almalinux10.sh`.
+`run-almalinux10.py`.
 
 After changing `user-data`, `meta-data`, or `network-config`, remove the old
 `seed.iso` and rebuild it:

seediso/debian13/README.md

@@ -1,7 +1,7 @@
 # Debian 13 seed.iso
 
 This directory contains the cloud-init NoCloud configuration used by
-`run-debian13.sh`.
+`run-debian13.py`.
 
 1. Edit `user-data`, `meta-data`, and (if needed) `network-config`.
 2. Build the image:

seediso/fedora44/README.md

@@ -1,7 +1,7 @@
 # Fedora 44 seed.iso
 
 This directory contains the cloud-init NoCloud configuration used by
-`run-fedora44.sh`. On first boot, cloud-init's package module installs Fedora's
+`run-fedora44.py`. On first boot, cloud-init's package module installs Fedora's
 GNOME package group and reboots the guest.
 
 After changing `user-data`, `meta-data`, or `network-config`, remove the old