[Matrix] Implement matrix support for the `fmod` HLSL Function

> Note: This issue tracks matrix support for `fmod`. The original implementation issue is [here](https://github.com/llvm/llvm-project/issues/99118).

Matrix requirements:
- [ ] https://github.com/llvm/wg-hlsl/issues/387

## HLSL:

Returns the floating-point remainder of x/y.

| *ret* fmod(*x*, *y*) |
|----------------------|

## Parameters

| Item | Description |
|--------------------------------------------------------|------------------------------------------------|
| *x*
| \[in\] The floating-point dividend.
|
| *y*
| \[in\] The floating-point divisor.
|

## Return Value

The floating-point remainder of the *x* parameter divided by the *y* parameter.

## Remarks

The floating-point remainder is calculated such that x = i \* y + f, where i is an integer, f has the same sign as x, and the absolute value of f is less than the absolute value of y.

## Type Description

| Name | [**Template Type**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md) | [**Component Type**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md) | Size |
|-------|----------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------|--------------------------------|
| *x* | [**scalar**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md), **vector**, or **matrix** | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | any |
| *y* | same as input *x* | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | same dimension(s) as input *x* |
| *ret* | same as input *x* | [**float**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/WinProg/windows-data-types.md) | same dimension(s) as input *x* |

## Minimum Shader Model

This function is supported in the following shader models.

| Shader Model | Supported |
|------------------------------------------------------------------------------------|-----------|
| [Shader Model 2 (DirectX HLSL)](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-sm2.md) and higher shader models | yes |
| [Shader Model 1 (DirectX HLSL)](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-sm1.md) | vs\_1\_1 |

## Requirements

| Requirement | Value |
|-------------------|--------------------------------------------------------------------------------------------|
| Header
|

Corecrt\_math.h

|

## See also

[**Intrinsic Functions (DirectX HLSL)**](https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src//direct3dhlsl/dx-graphics-hlsl-intrinsic-functions.md)

Review the original implementation issue #99118 and the matrix requirement in WG-HLSL issue #387 first. Use the HLSL fmod specification here to confirm that matrix x and y inputs produce a same-dimension matrix remainder, with the return value matching the input dimensions; the issue does not name implementation files or tests.

Written by the indexing model from the issue text.