refactor: use shared met-weather library for home-screen MET weather (v0.3.7)

- Replace internal MetApiService/MetForecastResponse + Retrofit MET fetch in
  AppHelper with dk.haugesenspil:met-weather (Gitea maven).
- fetchMetWeather now delegates to MetWeatherClient; 15-min cache kept.
- Drop MetApiService.kt and MetForecastResponse.kt.
release build v0.3.7

app/build.gradle.kts

@@ -19,8 +19,8 @@ android {
         applicationId = "app.easy.launcher"
         minSdk = 24
         targetSdk = 36
-        versionCode = 36
-        versionName = "0.3.6"
+        versionCode = 37
+        versionName = "0.3.7"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         manifestPlaceholders["internetPermission"] = "android.permission.INTERNET"
@@ -187,6 +187,7 @@ dependencies {
     implementation(libs.material)
     implementation(libs.retrofit)
     implementation(libs.converter.gson)
+    implementation("dk.haugesenspil:met-weather:0.1.0")
     implementation(libs.constraintlayout)
     implementation(libs.navigation.fragment.ktx)
     implementation(libs.navigation.ui.ktx)