feat: Add Grid View and Monthly Summary pages with workday management

- Implement GridView.razor for displaying a tabular view of workdays in the current month.
- Create MonthlySummary.razor to show a summary of worked hours, income, and day types for the selected month.
- Introduce WorkDayEditor.razor for adding and editing workday entries with detailed calculations.
- Update Home.razor to include links to the new Grid View and Monthly Summary pages.
- Add IWorkDayService interface and CouchbaseLiteWorkDayService implementation for managing workday data.
- Define domain models: WorkDayDocument, MonthlySummaryModel, and CoeffSnapshotDocument for data structure.
- Enhance CouchbaseLiteDatabaseProvider to include a collection for workdays.
- Update app settings and services to support new features.
- Add CSS styles for calendar view and table formatting.

Services/Storage/CouchbaseLiteDatabaseProvider.cs

@@ -8,6 +8,7 @@ public sealed class CouchbaseLiteDatabaseProvider : IDisposable
 {
     private const string AppSettingsCollectionName = "app_settings";
     private const string UsersCollectionName = "users";
+    private const string WorkDaysCollectionName = "workdays";
 
     private readonly Database database;
 
@@ -26,12 +27,15 @@ public sealed class CouchbaseLiteDatabaseProvider : IDisposable
 
         AppSettings = database.GetCollection(AppSettingsCollectionName) ?? database.CreateCollection(AppSettingsCollectionName);
         Users = database.GetCollection(UsersCollectionName) ?? database.CreateCollection(UsersCollectionName);
+        WorkDays = database.GetCollection(WorkDaysCollectionName) ?? database.CreateCollection(WorkDaysCollectionName);
     }
 
     public Collection AppSettings { get; }
 
     public Collection Users { get; }
 
+    public Collection WorkDays { get; }
+
     public void Dispose()
     {
         database.Close();