refactor: Add comments to app filtering logic in MainViewModel

This commit adds comments to the app filtering logic within `MainViewModel` to improve code clarity. The new comments explain the purpose of three specific checks:
- Skipping the launcher's own package.
- Preventing duplicate app entries.
- Filtering apps based on whether they are hidden or regular, according to user-defined settings.

Author: CreativeCodeCat

app/src/main/java/com/github/droidworksstudio/mlauncher/MainViewModel.kt

@@ -582,9 +582,14 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                         .mapNotNull { info ->
                             val pkg = info.applicationInfo.packageName
                             val cls = info.componentName.className
+
+                            // Skip your own app
                             if (pkg == BuildConfig.APPLICATION_ID) return@mapNotNull null
+
                             val key = appKey(pkg, cls, profile.hashCode())
                             if (!seenAppKeys.add(key)) return@mapNotNull null
+
+                            // Skip hidden / regular apps based on toggles
                             if ((isHidden(pkg, key) && !includeHiddenApps) || (!isHidden(pkg, key) && !includeRegularApps))
                                 return@mapNotNull null