BatteryService: create placeholder policy to chagne charging treshold without password

Bin/battery-manager/battery-manager.policy

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE policyconfig PUBLIC
+ "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd">
+<policyconfig>
+  <action id="com.local.battery-manager.ACTUAL_USER_PLACEHOLDER">
+    <description>Manage battery settings for ACTUAL_USER_PLACEHOLDER</description>
+    <message>Authentication is required to manage battery settings</message>
+    <defaults>
+      <allow_any>no</allow_any>
+      <allow_inactive>no</allow_inactive>
+      <allow_active>yes</allow_active>
+    </defaults>
+    <annotate key="org.freedesktop.policykit.exec.path">/usr/bin/battery-manager-ACTUAL_USER_PLACEHOLDER</annotate>
+    <annotate key="org.freedesktop.policykit.exec.allow_gui">true</annotate>
+  </action>
+</policyconfig>

Bin/battery-manager/battery-manager.rules

@@ -0,0 +1,14 @@
+polkit.addRule(function(action, subject) {
+    if (action.id == "com.local.battery-manager.ACTUAL_USER_PLACEHOLDER" &&
+        subject.user == "ACTUAL_USER_PLACEHOLDER") {
+
+        // Check if the parent process is quickshell or set-battery-threshold
+        var pid = subject.pid;
+        var ppid = polkit.spawn(["ps", "-o", "ppid=", "-p", pid.toString()]).trim();
+        var parentCmd = polkit.spawn(["ps", "-o", "comm=", "-p", ppid]).trim();
+
+        if (parentCmd.indexOf("quickshell") !== -1 || parentCmd.indexOf("set-battery-treshold") !== -1) {
+            return polkit.Result.YES;
+        }
+    }
+});