🤗 Kernels: Major Updates

The Kernels project standardizes how custom code modules are packaged, distributed, and used within a computing ecosystem. A new repository type called "kernel" has been introduced to make these modules more discoverable and to show which accelerators, operating systems, and backend versions are supported. Security is a primary concern because kernels execute native code with the same privileges as the Python process that loads them, so the project has added trusted publisher verification and code signing mechanisms to prevent malicious code from being loaded. The project is also establishing foundations for automated kernel development and expanding support across different frameworks and backends.