056f0bd22d
- Added native shell execution API via brush-core with streaming output support and configurable timeouts. - Migrated bash executor from persistent ptree-based shell sessions to native bindings with improved performance and simplified architecture. - Removed persistent shell session module and replaced with native brush-core implementation for better resource management. - Added executeShell() and abortShellExecution() functions to native bindings for shell command execution with cancellation support. - Implemented shell execution with support for environment variables, working directory changes, and timeout handling.