Enable symlink mode to prevent target drift

.chezmoi.toml.tmpl

@@ -4,6 +4,7 @@
 {{- if eq .chezmoi.os "darwin" -}}{{- $roleDefault = "mac" -}}{{- end -}}
 {{- $role := promptChoiceOnce . "role" "Machine role" (list "desktop" "laptop" "mac" "server") $roleDefault -}}
 
+mode = "symlink"
 encryption = "age"
 
 [age]