Add Phase 5 features: streaming, tools, multi-provider support

- streaming.py: Stream support with sync/async iterators
- tools.py: Function calling with @tool decorator
- providers.py: OpenAI and Anthropic provider support
- 35 new tests, 103 total tests passing

Author: ChidcGithub

cognipy/__init__.py

@@ -9,10 +9,13 @@
 - 反思循环：LLM 自我检查与修正
 - 异步调度：高性能并发调用
 - 确定性保证：类型约束、幻觉检测
+- 流式响应：实时输出支持
+- 工具调用：Function Calling 支持
+- 多提供商：OpenAI、Anthropic 等
 - 混合执行模型：确定性逻辑与模糊意图的无缝协同
 """
 
-__version__ = "0.1.0"
+__version__ = "0.2.0"
 
 from .runtime import cognitive_call, CognitiveContext
 from .decorator import cognitive
@@ -56,6 +59,36 @@
     HallucinationCheck,
     deterministic_call
 )
+from .streaming import (
+    StreamStatus,
+    StreamChunk,
+    StreamResult,
+    stream_call,
+    stream_call_async,
+    stream_iter,
+    stream_iter_async
+)
+from .tools import (
+    ToolType,
+    ToolParameter,
+    ToolDefinition,
+    ToolCall,
+    ToolResult,
+    ToolRegistry,
+    tool,
+    call_with_tools,
+    register_tool,
+    get_global_registry
+)
+from .providers import (
+    ProviderType,
+    ProviderConfig,
+    BaseProvider,
+    OpenAIProvider,
+    AnthropicProvider,
+    ProviderFactory,
+    create_provider
+)
 
 __all__ = [
     # Core
@@ -98,4 +131,31 @@
     "HallucinationDetector",
     "HallucinationCheck",
     "deterministic_call",
+    # Streaming
+    "StreamStatus",
+    "StreamChunk",
+    "StreamResult",
+    "stream_call",
+    "stream_call_async",
+    "stream_iter",
+    "stream_iter_async",
+    # Tools
+    "ToolType",
+    "ToolParameter",
+    "ToolDefinition",
+    "ToolCall",
+    "ToolResult",
+    "ToolRegistry",
+    "tool",
+    "call_with_tools",
+    "register_tool",
+    "get_global_registry",
+    # Providers
+    "ProviderType",
+    "ProviderConfig",
+    "BaseProvider",
+    "OpenAIProvider",
+    "AnthropicProvider",
+    "ProviderFactory",
+    "create_provider",
 ]