[TypeSpec] Generate SDK for TypeSpec project https://github.com/Azure/azure-rest-api-specs/specification/appconfiguration

## SDK generate request for TypeSpec project https://github.com/Azure/azure-rest-api-specs/specification/appconfiguration

Request to generate SDK by Copilot. **Do not release SDK**
SDK will be released later by service owner.

**Release Plan**: [2049](https://web.powerapps.com/apps/821ab569-ae60-420d-8264-d7b5d5ef734c?release-plan-id=0009b00f-9df0-f011-8407-000d3a3b8d97)
**TypeSpec project path**: https://github.com/Azure/azure-rest-api-specs/specification/appconfiguration
**API spec pull request link**: [https://github.com/Azure/azure-rest-api-specs/pull/38240](https://github.com/Azure/azure-rest-api-specs/pull/38240)
**SDK release type**: Beta
**API spec version**: 2025-06-01-preview
**Spec Type**: TypeSpec
**Language**: .NET
**Release plan work item ID**: 30193

**Contacts**:
cwanjau

**Comments**:
Generate SDK using Github copilot

Generate SDK for the TypeSpec project and update the generated SDK details in the release plan using release plan work item. Generate a summary and update it back in the linked GitHub issue once SDK pull requests are generated.