Checkboxlist component updates (#80)

* feat: Add CheckboxListInput component and related documentation

- Implemented CheckboxListInput component for rendering a list of checkboxes with Bulma styling.
- Added CheckboxListInputItem model to represent individual checkbox items.
- Introduced CheckboxListInputSize enum for size variations.
- Created multiple demo pages showcasing CheckboxListInput features including data binding, sizes, disabled states, and event handling.
- Updated existing layouts to include links to the new CheckboxListInput documentation.
- Added validation support for CheckboxListInput within Blazor forms.

* feat: Add orientation support to CheckboxListInput component and update documentation

* feat: Update button components in CheckboxListInput demos for consistency

Author: gvreddy04

BlazorExpress.Bulma.Demo.RCL/Pages/Demos/Form/CheckboxListInput/CheckboxListInput_Demo_07_Validations.razor

@@ -27,7 +27,7 @@
         <ValidationMessage For="@(() => subscription.DeliveryDays)" />
     </div>
 
-    <Button Class="mt-3" Color="ButtonColor.Primary" Type="ButtonType.Submit">
+    <Button Class="mt-3" Color="ButtonColor.Primary" Type="ButtonType.Submit" Size="ButtonSize.Small">
         Submit
     </Button>
 </EditForm>

BlazorExpress.Bulma.Demo.RCL/Pages/Demos/Form/CheckboxListInput/CheckboxListInput_Demo_08_Methods_SelectAll_Clear.razor

@@ -1,6 +1,10 @@
 <div class="buttons">
-    <button class="button is-link is-small" type="button" @onclick="SelectAllAsync">Select all</button>
-    <button class="button is-light is-small" type="button" @onclick="ClearAsync">Clear</button>
+    <Button Class="mt-3" Color="ButtonColor.Link" Type="ButtonType.Submit" Size="ButtonSize.Small" @onclick="SelectAllAsync">
+        Select all
+    </Button>
+    <Button Class="mt-3" Color="ButtonColor.Light" Type="ButtonType.Submit" Size="ButtonSize.Small" @onclick="ClearAsync">
+        Clear
+    </Button>
 </div>
 
 <CheckboxListInput @ref="checkboxListInputRef"