feat: Implement automated versioning system with PowerShell build script and centralized version management

- Add version.properties file as single source of truth for VERSION_NAME and VERSION_CODE
- Create build.ps1 script with automated version bumping (Major/Minor/Patch/None) and build orchestration
- Update app/build.gradle.kts to read version from version.properties instead of hardcoded values
- Display dynamic version info in Settings screen using BuildConfig.VERSION_NAME and VERSION_CODE
- Add

app/src/main/java/com/shaarit/presentation/settings/SettingsScreen.kt

@@ -1,6 +1,7 @@
 package com.shaarit.presentation.settings
 
 import android.content.Intent
+import com.shaarit.BuildConfig
 import android.net.Uri
 import android.widget.Toast
 import androidx.activity.compose.rememberLauncherForActivityResult
@@ -318,7 +319,7 @@ fun SettingsScreen(
                 SettingsItem(
                     icon = Icons.Default.Info,
                     title = "Version",
-                    subtitle = "ShaarIt v1.0",
+                    subtitle = "ShaarIt v${BuildConfig.VERSION_NAME} (build ${BuildConfig.VERSION_CODE})",
                     onClick = {}
                 )
             }