Refactor AlmaLinux VM installer & lobehub setup

Modernize and simplify VM installer and lobehub installation flows.

Key changes:
- install/lobehub-install.sh: consolidated apt invocation, replaced manual ParadeDB .deb download with fetch_and_deploy_gh_release helper, added postgresql pg_search preload configuration and restart, moved pnpm installation into setup_nodejs via NODE_MODULE, and adjusted build env handling.
- vm/almalinux-10-vm.sh: major refactor to source shared functions from COMMUNITY_SCRIPTS_URL, add load_functions, centralize cloud-init handling (configure_cloudinit_ssh_keys / setup_cloud_init), replace many custom UI/helper functions with standardized helpers and exit_script, update traps and error handling, simplify prompts/defaults, use $STD for apt operations, and streamline image customization and VM creation flow.
- Added vm/headers/almalinux-10-vm containing the VM header art and title.

These changes centralize common logic, improve cloud-init integration, reduce duplicated code, and make maintenance easier.

vm/headers/almalinux-10-vm

@@ -0,0 +1,11 @@
+
+   █████╗ ██╗     ███╗   ███╗ █████╗ ██╗     ██╗███╗   ██╗██╗   ██╗██╗  ██╗
+  ██╔══██╗██║     ████╗ ████║██╔══██╗██║     ██║████╗  ██║██║   ██║╚██╗██╔╝
+  ███████║██║     ██╔████╔██║███████║██║     ██║██╔██╗ ██║██║   ██║ ╚███╔╝
+  ██╔══██║██║     ██║╚██╔╝██║██╔══██║██║     ██║██║╚██╗██║██║   ██║ ██╔██╗
+  ██║  ██║███████╗██║ ╚═╝ ██║██║  ██║███████╗██║██║ ╚████║╚██████╔╝██╔╝ ██╗
+  ╚═╝  ╚═╝╚══════╝╚═╝     ╚═╝╚═╝  ╚═╝╚══════╝╚═╝╚═╝  ╚═══╝ ╚═════╝ ╚═╝  ╚═╝
+
+                        AlmaLinux 10 VM
+                        (Heliotrope Lion)
+