Rename MainActivity to SetupActivity

app/src/main/AndroidManifest.xml

@@ -10,7 +10,7 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Jellyfin">
         <activity
-            android:name=".MainActivity"
+            android:name=".SetupActivity"
             android:windowSoftInputMode="adjustPan">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/dev/jdtech/jellyfin/SetupActivity.kt

@@ -3,9 +3,9 @@ package dev.jdtech.jellyfin
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 
-class MainActivity : AppCompatActivity() {
+class SetupActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        setContentView(R.layout.activity_setup)
     }
 }

app/src/main/res/layout/activity_setup.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    tools:context=".SetupActivity">
 
     <androidx.fragment.app.FragmentContainerView
         android:id="@+id/nav_host_fragment"