adding mdns so we dont rely on ip to connect

Provider/main/mdns_service.cpp

@@ -0,0 +1,35 @@
+#include "esp_log.h"
+#include "mdns.h"
+#include "sdkconfig.h"
+
+static const char *kLogMDNS = "MDNS";
+
+void start_mdns()
+{
+  printf("MDNS: start_mdns() called\n");
+  // Initialize mDNS
+  esp_err_t err = mdns_init();
+  if (err != ESP_OK)
+  {
+    ESP_LOGE(kLogMDNS, "mDNS Init failed: %d", err);
+    return;
+  }
+
+  // Set mDNS hostname (from Kconfig)
+  const char *hostname = CONFIG_CALENDINK_MDNS_HOSTNAME;
+  mdns_hostname_set(hostname);
+  ESP_LOGI(kLogMDNS, "mDNS Hostname set to: [%s.local]", hostname);
+
+  // Set mDNS instance name
+  mdns_instance_name_set("Calendink Provider");
+
+  // Add HTTP service
+  err = mdns_service_add(NULL, "_http", "_tcp", 80, NULL, 0);
+  if (err != ESP_OK)
+  {
+    ESP_LOGE(kLogMDNS, "mDNS Service add failed: %d", err);
+  }
+
+  printf("MDNS: Service initialized with hostname [%s.local]\n", hostname);
+  ESP_LOGI(kLogMDNS, "mDNS Service initialized");
+}