Use ".debug" suffix and set app name for debug builds

The `build.gradle.kts` file has been updated for the `debug` build type.

The `applicationIdSuffix` is changed from `.dev` to `.debug` to more accurately reflect the build type. Additionally, a new `resValue` is added to set the `app_name` to "Multi Launcher Debug" for these builds, making them easier to identify when installed.

Author: CreativeCodeCat

app/build.gradle.kts

@@ -90,11 +90,12 @@ android {
             isDebuggable = true
             isMinifyEnabled = false
             isShrinkResources = false
-            applicationIdSuffix = ".dev"
+            applicationIdSuffix = ".debug"
 
             signingConfig = signingConfigs["release"]
 
             resValue("string", "app_version", baseVersionName)
+            resValue("string", "app_name", "Multi Launcher Debug")
             resValue("string", "empty", "")
         }