chore: add comments before tasks and handlers

tasks/routing.yaml

@@ -1,5 +1,6 @@
 ---
 
+# install iptables
 - name: "install iptables"
   community.general.apk:
     name:
@@ -7,6 +8,7 @@
     state: "present"
     update_cache: true
 
+# enable ipv4 forwarding
 - name: "configure ipv4 forwarding"
   ansible.posix.sysctl:
     name: "net.ipv4.conf.all.forwarding"
@@ -15,6 +17,7 @@
     sysctl_file: "/etc/sysctl.conf"
     reload: false
 
+# disable ipv4 redirects and source routing
 - name: "disable ipv4 redirects and source routing"
   ansible.posix.sysctl:
     name: "{{ item.name }}"