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.

Domain/MonthlySummaryModel.cs

@@ -0,0 +1,30 @@
+namespace WorkTracker.Domain;
+
+public sealed class MonthlySummaryModel
+{
+    public int Year { get; set; }
+
+    public int Month { get; set; }
+
+    public decimal TotalWorkedHours { get; set; }
+
+    public int OfficeDays { get; set; }
+
+    public int HomeDays { get; set; }
+
+    public int HolidayDays { get; set; }
+
+    public int SickDays { get; set; }
+
+    public int DaysOff { get; set; }
+
+    public int ClosureDays { get; set; }
+
+    public decimal TotalHoursOff { get; set; }
+
+    public decimal TotalGrossIncome { get; set; }
+
+    public decimal TotalNetIncome { get; set; }
+
+    public int TotalWorkingDays { get; set; }
+}