feat(kernel): add internal ZCLAW kernel integration with Tauri

Phase 1-3 of independence architecture:
- zclaw-types: Add ToolDefinition, ToolResult, KernelConfig, ModelConfig
- zclaw-kernel: Fix AgentInfo provider field, export config module
- desktop: Add kernel_commands for internal kernel access
- Add AgentId FromStr implementation for parsing

New Tauri commands:
- kernel_init, kernel_status, kernel_shutdown
- agent_create, agent_list, agent_get, agent_delete
- agent_chat

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/zclaw-kernel/src/lib.rs

@@ -0,0 +1,15 @@
+//! ZCLAW Kernel
+//!
+//! Central coordinator for all ZCLAW subsystems.
+
+mod kernel;
+mod registry;
+mod capabilities;
+mod events;
+pub mod config;
+
+pub use kernel::*;
+pub use registry::*;
+pub use capabilities::*;
+pub use events::*;
+pub use config::*;