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.

Components/Layout/NavMenu.razor

@@ -14,6 +14,30 @@
             </NavLink>
         </div>
 
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="workday">
+                <span class="bi bi-plus-square-fill-nav-menu" aria-hidden="true"></span> New Entry
+            </NavLink>
+        </div>
+
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="grid">
+                <span class="bi bi-list-nested-nav-menu" aria-hidden="true"></span> Grid View
+            </NavLink>
+        </div>
+
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="calendar">
+                <span class="bi bi-calendar3-nav-menu" aria-hidden="true"></span> Calendar
+            </NavLink>
+        </div>
+
+        <div class="nav-item px-3">
+            <NavLink class="nav-link" href="summary">
+                <span class="bi bi-bar-chart-fill-nav-menu" aria-hidden="true"></span> Summary
+            </NavLink>
+        </div>
+
         <div class="nav-item px-3">
             <NavLink class="nav-link" href="settings">
                 <span class="bi bi-gear-fill-nav-menu" aria-hidden="true"></span> Settings