feat: add support for non-nullable components with DateOrToday and TimeOrNow properties in LocalTimeForm

Author: arika0093

example/BlazorLocalTimeSample/Pages/Home.razor

@@ -147,6 +147,33 @@
     </LocalTimeForm>
 </div>
 
+<p>
+    If you want to use non-nullable components or create a form that sets the current date and time as the initial value,
+    you can use the <code>DateOrToday</code> and <code>TimeOrNow</code> properties.
+</p>
+<pre><code class="language-razor">Value: @@(Dt?.ToString("yyyy-MM-dd HH:mm:ssK") ?? "Not specified yet")
+&lt;br /&gt;
+&lt;LocalTimeForm @@bind-Value="Dt" Context="dtf"&gt;
+    &lt;InputDate Type="InputDateType.Date" @@bind-Value="dtf.DateOrToday" /&gt;
+    &lt;InputDate Type="InputDateType.Time" @@bind-Value="dtf.TimeOrNow" /&gt;
+    &lt;button @@onclick="() =&gt; Dt = null"&gt;Reset&lt;/button&gt;
+&lt;/LocalTimeForm&gt;
+
+@@code {
+    private DateTime? Dt { get; set; } = DateTime.UtcNow;
+}
+</code></pre>
+
+<div class="component-sample">
+    Value: @(Dt2?.ToString("yyyy-MM-dd HH:mm:ssK") ?? "Not specified yet")
+    <br />
+    <LocalTimeForm @bind-Value="Dt2" Context="dtf">
+        <InputDate Type="InputDateType.Date" @bind-Value="dtf.DateOrToday" />
+        <InputDate Type="InputDateType.Time" @bind-Value="dtf.TimeOrNow" />
+        <button @onclick="() => Dt2 = null">Reset</button>
+    </LocalTimeForm>
+</div>
+
 <h2>Using with UI Libraries</h2>
 
 <p>
@@ -321,6 +348,7 @@ Current Time: &lt;LocalTimeText Value="@@DateTime.UtcNow" Format="yyyy-MM-dd HH:
 @inject ILocalTimeService LocalTimeService
 @code {
     private DateTime? Dt { get; set; } = DateTime.UtcNow;
+    private DateTime? Dt2 { get; set; }
 
     private DateTimeOffset? LocalDt { get; set; }
     private void ButtonClicked()