[Feature Request] Add FluentNumberInput component for V5

[AClerbois]

Summary

The V5 release of Fluent UI Blazor does not include a dedicated FluentNumberInput component for numeric input. In V4, numeric input was handled via FluentNumberField, but there is no equivalent in V5.

A FluentNumberInput<TValue> component wrapping <fluent-text-input type="number"> with proper step/min/max support would be very useful.

Use Case

Entering numeric values (integers, decimals) with validation, step increment, and min/max boundaries is a common requirement in forms.

Expected API / Code Example

@using Microsoft.FluentUI.AspNetCore.Components

<FluentNumberInput TValue="int"
                   @bind-Value="@Quantity"
                   Min="0"
                   Max="100"
                   Step="1"
                   Placeholder="Enter quantity"
                   Label="Quantity"
                   Required="true" />

<FluentNumberInput TValue="decimal"
                   @bind-Value="@Price"
                   Min="0.00m"
                   Max="9999.99m"
                   Step="0.01m"
                   Placeholder="Enter price"
                   Label="Price"
                   Width="200px" />

@code {
    private int Quantity { get; set; } = 1;
    private decimal Price { get; set; } = 9.99m;
}

Expected Parameters

Parameter	Type	Description
TValue	Generic (int, double, decimal, etc.)	The numeric type for the value
Value	TValue	The bound value
Min	TValue?	Minimum allowed value
Max	TValue?	Maximum allowed value
Step	TValue?	Step increment (e.g., 0.01 for decimals)
Placeholder	string?	Hint text shown when empty
Appearance	TextInputAppearance	Visual style (Outline, FilledLighter, etc.)
StartTemplate	RenderFragment?	Content prefix (e.g., currency symbol)
EndTemplate	RenderFragment?	Content suffix (e.g., unit label)

Additional Context

This component should support:

• All common numeric types (byte, short, int, long, float, double, decimal)
• Proper invariant culture parsing (HTML <input type="number"> uses . as decimal separator regardless of locale)
• Integration with FluentField for label, validation messages, and required state
• Immediate mode (update on each keystroke) and standard mode (update on blur/change)

[MarvinKlein1508]

See #4544