fix(picoclaw): add missing closing brace for StreamingProvider interface

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

pkg/providers/types.go

@@ -49,6 +49,8 @@ type StreamingProvider interface {
 		options map[string]any,
 		onChunk func(accumulated string),
 	) (*LLMResponse, error)
+}
+
 // ThinkingCapable is an optional interface for providers that support
 // extended thinking (e.g. Anthropic). Used by the agent loop to warn
 // when thinking_level is configured but the active provider cannot use it.