Faster / Better speakeasy run CLI commands

Speakeasy has introduced three enhancements to its "speakeasy run" command, aimed at improving the efficiency, flexibility, and scalability of SDK generation. The updates include support for concurrent execution, which allows multiple local repositories to be processed simultaneously, significantly reducing execution time. Additionally, the --github-repos flag enables users to manage and update all connected GitHub repositories with a single command, simplifying the management of extensive SDK ecosystems. The command also offers flexible output formatting options, including console, summary, and mermaid, to cater to different use cases such as debugging, CI/CD pipelines, and documentation. These improvements are particularly beneficial for platform teams managing multiple APIs and DevOps engineers integrating SDK generation into their workflows, and are available from Speakeasy CLI version 1.548.0 onwards.