Remove deprecated files and update documentation links for Azure integrations

- Deleted favicon.png and Dapr.sln files from the Dapr snippet.
- Removed SQLite Entity Framework integration documentation.
- Removed SQLite integration documentation.
- Updated links in local-auth-disabled-for-azure-resources.md for Azure Web PubSub.
- Corrected Azure Container Apps documentation link in aca-deployment-aspire-cli.md.
- Updated Azure Key Vault and managed identity links in azure-security-best-practices.md.
- Cleaned up caching integrations deployment documentation.
- Revised SQL Server integration deployment documentation.
- Updated test-deployed-app.md to fix link formatting.
- Adjusted dev-containers.md to remove unnecessary Docker reference.

Author: IEvangelist