support multiple items in hwmon-path of temperature module

So user can share configuration file among different machines with different hardware
configurations.

man/waybar-temperature.5.scd

@@ -19,6 +19,8 @@ Addressed by *temperature*
 *hwmon-path*: ++
 	typeof: string ++
 	The temperature path to use, e.g. */sys/class/hwmon/hwmon2/temp1_input* instead of one in */sys/class/thermal/*.
+	This can also be an array of strings. In this case, waybar will check each item in the array and use the first valid one.
+	This is suitable if you want to share the same configuration file among different machines with different hardware configurations.
 
 *hwmon-path-abs*: ++
 	typeof: string ++
@@ -117,7 +119,7 @@ Addressed by *temperature*
 ```
  "temperature": {
 	// "thermal-zone": 2,
-	// "hwmon-path": "/sys/class/hwmon/hwmon2/temp1_input",
+	// "hwmon-path": ["/sys/class/hwmon/hwmon2/temp1_input", "/sys/class/thermal/thermal_zone0/temp"],
 	// "critical-threshold": 80,
 	// "format-critical": "{temperatureC}°C ",
 	"format": "{temperatureC}°C "

src/modules/temperature.cpp

@@ -11,8 +11,18 @@ waybar::modules::Temperature::Temperature(const std::string& id, const Json::Val
 #if defined(__FreeBSD__)
 // try to read sysctl?
 #else
-  if (config_["hwmon-path"].isString()) {
-    file_path_ = config_["hwmon-path"].asString();
+  auto& hwmon_path = config_["hwmon-path"];
+  if (hwmon_path.isString()) {
+    file_path_ = hwmon_path.asString();
+  } else if (hwmon_path.isArray()) {
+    // if hwmon_path is an array, loop to find first valid item
+    for (auto& item : hwmon_path) {
+      auto path = item.asString();
+      if (std::filesystem::exists(path)) {
+        file_path_ = path;
+        break;
+      }
+    }
   } else if (config_["hwmon-path-abs"].isString() && config_["input-filename"].isString()) {
     file_path_ = (*std::filesystem::directory_iterator(config_["hwmon-path-abs"].asString()))
                      .path()