feat(mise): Allow to declare bootstrap package per host

Whitout this, you can only specify packages per os (distrib).

.chezmoidata/hosts.yaml

@@ -55,6 +55,8 @@ hosts:
         configs: {}
   # Termux (application de terminal pour android)
   termux-debian:
+    packages:
+      - apt:zsh
     users:
       root:
         toolboxes:
@@ -65,6 +67,8 @@ hosts:
           - terminal
           - dev-tools
   termux-ubuntu:
+    packages:
+      - apt:zsh
     users:
       root:
         toolboxes: