feat(AppVersion): Add version tracking system for frontend cache invalidation

- Add AppVersion entity with CurrentVersion, MinRequiredVersion, RequiresFullCacheClear
- Add GetAppVersion query to check app version and compare with client version
- Add GetAllAppVersions query for admin panel
- Add UpdateAppVersion command to update/create app versions
- Add appversion.proto for gRPC communication
- Add AppVersionService for gRPC endpoints
- Add database migration for AppVersions table

src/CMSMicroservice.Application/AppVersionCQ/Queries/GetAppVersion/GetAppVersionQuery.cs

@@ -0,0 +1,22 @@
+namespace CMSMicroservice.Application.AppVersionCQ.Queries.GetAppVersion;
+
+/// <summary>
+/// Query برای دریافت آخرین نسخه یک اپلیکیشن
+/// </summary>
+public record GetAppVersionQuery(string AppName, string? CurrentClientVersion = null) : IRequest<AppVersionDto?>;
+
+/// <summary>
+/// DTO برای اطلاعات نسخه اپلیکیشن
+/// </summary>
+public record AppVersionDto
+{
+    public bool Found { get; init; }
+    public string AppName { get; init; } = string.Empty;
+    public string CurrentVersion { get; init; } = string.Empty;
+    public string MinRequiredVersion { get; init; } = string.Empty;
+    public bool RequiresFullCacheClear { get; init; }
+    public bool RequiresUpdate { get; init; }
+    public string? UpdateMessage { get; init; }
+    public string? ReleaseNotes { get; init; }
+    public DateTime? LastUpdated { get; init; }
+}