feat(tinyclaw): add integration tests and lib.rs for skills

Create lib.rs to export public API for integration tests:
- Export agent, bus, channel, channels, config modules
- Export format, session, skills, tools modules
- Enable external testing of skills system

Add comprehensive integration tests (13 tests):
- test_skill_save_and_load: Persistence roundtrip
- test_skill_list_and_delete: CRUD operations
- test_skill_execution_success: End-to-end execution
- test_skill_execution_with_defaults: Default input handling
- test_skill_execution_missing_required_input: Validation
- test_skill_execution_timeout: Timeout behavior
- test_skill_execution_cancellation: Cancel functionality
- test_execution_report_generation: Report creation
- test_progress_monitoring: Real-time progress tracking
- test_complex_skill_with_all_step_types: Tool/LLM/Shell steps
- test_skill_versioning: Version overwrite behavior
- test_empty_skill_execution: Edge case handling
- test_skill_with_many_inputs: Multiple input handling

Total: 115 tests passing (102 unit + 13 integration)

Author: AlexMikhalev

crates/terraphim_tinyclaw/src/lib.rs

@@ -0,0 +1,20 @@
+//! TinyClaw - Multi-channel AI assistant for Terraphim
+//!
+//! This crate provides a multi-channel AI assistant that can interact
+//! through Telegram, Discord, CLI, and other channels. It includes:
+//!
+//! - **Agent Loop**: Core conversation handling with tool calling
+//! - **Channels**: Adapters for different messaging platforms
+//! - **Tools**: Extensible tool system for filesystem, web, shell operations
+//! - **Skills**: JSON-based reusable workflows
+//! - **Session Management**: Persistent conversation history
+
+pub mod agent;
+pub mod bus;
+pub mod channel;
+pub mod channels;
+pub mod config;
+pub mod format;
+pub mod session;
+pub mod skills;
+pub mod tools;