chore: import clean Agent Desk snapshot (2/7)

internal/ai/rag/chunk/provider.go

@@ -0,0 +1,12 @@
+package chunk
+
+import (
+	"agent-desk/internal/pkg/enums"
+	"context"
+)
+
+type Provider interface {
+	Name() string
+	Supports(contentType enums.KnowledgeDocumentContentType) bool
+	Chunk(ctx context.Context, req *ChunkRequest) ([]ChunkResult, error)
+}