[AVM Module Issue]: Add Aspire Dashboard component support to avm/res/app/managed-environment

### Check for previous/existing GitHub issues

- [x] I have checked for previous/existing GitHub issues

### Issue Type?

Feature Request

### Module Name

avm/res/app/managed-environment

### (Optional) Module Version

0.13.2

### Description

Azure Container Apps managed environments support adding an Aspire Dashboard during deployment. Reference: https://learn.microsoft.com/en-us/azure/templates/microsoft.app/managedenvironments/dotnetcomponents?pivots=deployment-language-bicep

It would be useful if this could be enabled in the resource like other components are (e.g. dapr component: https://github.com/Azure/bicep-registry-modules/tree/main/avm/res/app/managed-environment#parameter-daprconfiguration)

This component is enabled with:

```bicep
@sys.description('Name of the Container Apps Managed Environment to enable the Aspire Dashboard on.')
param containerAppsEnvironmentName string

resource containerAppsEnvironment 'Microsoft.App/managedEnvironments@2026-01-01' existing = {
name: containerAppsEnvironmentName
}

resource aspireDashboard 'Microsoft.App/managedEnvironments/dotNetComponents@2025-10-02-preview' = {
name: 'aspire-dashboard'
parent: containerAppsEnvironment
properties: {
componentType: 'AspireDashboard'
}
}
```

See: https://learn.microsoft.com/en-us/azure/container-apps/aspire-dashboard?pivots=azd

### (Optional) Correlation Id

_No response_