Add devcontainer setup, bump minSdk to 34, rename app to Bong Hit Timer

app/src/main/AndroidManifest.xml

@@ -4,7 +4,7 @@
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_timer"
-        android:label="Countdown Timer"
+        android:label="Bong Hit Timer"
         android:supportsRtl="true"
         android:theme="@style/Theme.CountdownTimer">
         <activity