Update mcpd-plugins-sdk-go import path for restructured package

Update import path from:
  github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1/plugins
to:
  github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1

The alias 'pluginv1' is preserved so no other code changes are needed.
Requires mcpd-plugins-sdk-go v0.1.0 to be released first, at which
point go.mod and NOTICE should also be updated.

Author: peteski22

internal/plugin/adapter.go

@@ -7,7 +7,7 @@ import (
 
 	"google.golang.org/protobuf/types/known/emptypb"
 
-	pluginv1 "github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1/plugins"
+	pluginv1 "github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1"
 
 	"github.com/mozilla-ai/mcpd/internal/config"
 )

internal/plugin/manager.go

@@ -21,7 +21,7 @@ import (
 	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/protobuf/types/known/emptypb"
 
-	pluginv1 "github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1/plugins"
+	pluginv1 "github.com/mozilla-ai/mcpd-plugins-sdk-go/pkg/plugins/v1"
 
 	"github.com/mozilla-ai/mcpd/internal/config"
 	"github.com/mozilla-ai/mcpd/internal/files"