feat: add OpenAI/Anthropic tools support with tool emulation

- Parse tools/tool_choice from OpenAI and Anthropic requests
- Inject tool definitions into system prompt via toolemulation
- Parse action blocks (```json action) from model responses
- Retry logic for forced tool_choice (any/required)
- Return proper tool_calls / tool_use in responses
- Support streaming tools via collect-and-replay pattern
- Add tool history projection (assistant tool_calls + tool results)
- Model ID normalization: use official names (Qwen3.6-Plus, etc.)
- Fix resolveSessionMode to use Fresh mode when tools present

internal/lingmaipc/pipe_other.go

@@ -0,0 +1,12 @@
+//go:build !windows
+
+package lingmaipc
+
+import (
+	"context"
+	"errors"
+)
+
+func connectPipeTransport(ctx context.Context, pipePath string) (framedTransport, error) {
+	return nil, errors.New("pipe transport is only supported on Windows")
+}