Migrate Mihomo and IPtables scripts from systemd to OpenRC and update service configurations

init-scripts/openrc/mihomo-iptables

@@ -0,0 +1,14 @@
+#!/sbin/openrc-run
+
+description="Mihomo IPtables Rules"
+
+depend() {
+    need net
+    before mihomo
+}
+
+start() {
+    ebegin "Applying Mihomo IPtables rules"
+    /usr/local/bin/iptables-mihomo-setup.sh
+    eend $?
+}