Add optional git-lfs support to default checkout

### 📝 Description of the feature

## Feature Request: Optional Git LFS Support for Default Checkout Action

### Description

It would be helpful to add an optional parameter that enables Git LFS support during the default checkout process for repositories with large files requiring LFS.

Example usage:

```yaml
- uses: ansys/actions/
with:
git-lfs: true
```

Default value:

```yaml
git-lfs: false
```

### Expected Behavior

When `git-lfs` is enabled, the action should perform the equivalent of a `git lfs pull` (or otherwise ensure that all LFS-managed files are downloaded and available) after the repository checkout.

### Motivation

Many repositories rely on Git LFS for large assets. Currently, users need to add the checkout step manually with that option and provide `checkout: false` option. Providing built-in support through an optional parameter would simplify workflows while preserving the current behavior by default.

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

_No response_

Start by locating the default checkout action and its input definitions, then inspect how the checkout step is invoked. Confirm how existing checkout options are passed through and how Git LFS is available in the action environment; done means git-lfs defaults to false and enabled workflows obtain their LFS-managed files without requiring a separate checkout step.

Written by the indexing model from the issue text.