move profiler to internal/

Author: mattdholloway

pkg/profiler/profiler.go renamed to internal/profiler/profiler.go

@@ -8,9 +8,9 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/github/github-mcp-server/internal/profiler"
 	buffer "github.com/github/github-mcp-server/pkg/buffer"
 	ghErrors "github.com/github/github-mcp-server/pkg/errors"
-	"github.com/github/github-mcp-server/pkg/profiler"
 	"github.com/github/github-mcp-server/pkg/translations"
 	"github.com/google/go-github/v74/github"
 	"github.com/mark3labs/mcp-go/mcp"