refactor: rename utils to mcpresult to fix revive issue

.github/agents/go-sdk-tool-migrator.md

@@ -18,7 +18,7 @@ When generating the migration guide, consider the following aspects:
 * The return type for the tool constructor function should be updated from `mcp.Tool, server.ToolHandlerFunc` to `(mcp.Tool, mcp.ToolHandlerFor[map[string]any, any])`.
 * The tool handler function signature should be updated to use generics, changing from `func(ctx context.Context, mcp.CallToolRequest) (*mcp.CallToolResult, error)` to `func(context.Context, *mcp.CallToolRequest, map[string]any) (*mcp.CallToolResult, any, error)`.
 * The `RequiredParam`, `RequiredInt`, `RequiredBigInt`, `OptionalParamOK`, `OptionalParam`, `OptionalIntParam`, `OptionalIntParamWithDefault`, `OptionalBoolParamWithDefault`, `OptionalStringArrayParam`, `OptionalBigIntArrayParam` and `OptionalCursorPaginationParams` functions should be changed to use the tool arguments that are now passed as a map in the tool handler function, rather than extracting them from the `mcp.CallToolRequest`.
-* `mcp.NewToolResultText`, `mcp.NewToolResultError`, `mcp.NewToolResultErrorFromErr` and `mcp.NewToolResultResource` no longer available in `modelcontextprotocol/go-sdk`. There are a few helper functions available in `pkg/utils/result.go` that can be used to replace these, in the `utils` package.
+* `mcp.NewToolResultText`, `mcp.NewToolResultError`, `mcp.NewToolResultErrorFromErr` and `mcp.NewToolResultResource` no longer available in `modelcontextprotocol/go-sdk`. There are a few helper functions available in `pkg/mcpresult/result.go` that can be used to replace these, in the `mcpresult` package.
 
 ### Schema Changes
 

pkg/errors/error.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/github/github-mcp-server/pkg/utils"
+	"github.com/github/github-mcp-server/pkg/mcpresult"
 	"github.com/google/go-github/v79/github"
 	"github.com/modelcontextprotocol/go-sdk/mcp"
 )
@@ -153,31 +153,31 @@ func addRawAPIErrorToContext(ctx context.Context, err *GitHubRawAPIError) (conte
 	return nil, fmt.Errorf("context does not contain GitHubCtxErrors")
 }
 
-// NewGitHubAPIErrorResponse returns an mcp.NewToolResultError and retains the error in the context for access via middleware
+// NewGitHubAPIErrorResponse returns an mcp.CallToolResult and retains the error in the context for access via middleware
 func NewGitHubAPIErrorResponse(ctx context.Context, message string, resp *github.Response, err error) *mcp.CallToolResult {
 	apiErr := newGitHubAPIError(message, resp, err)
 	if ctx != nil {
 		_, _ = addGitHubAPIErrorToContext(ctx, apiErr) // Explicitly ignore error for graceful handling
 	}
-	return utils.NewToolResultErrorFromErr(message, err)
+	return mcpresult.NewErrorFromErr(message, err)
 }
 
-// NewGitHubGraphQLErrorResponse returns an mcp.NewToolResultError and retains the error in the context for access via middleware
+// NewGitHubGraphQLErrorResponse returns an mcp.CallToolResult and retains the error in the context for access via middleware
 func NewGitHubGraphQLErrorResponse(ctx context.Context, message string, err error) *mcp.CallToolResult {
 	graphQLErr := newGitHubGraphQLError(message, err)
 	if ctx != nil {
 		_, _ = addGitHubGraphQLErrorToContext(ctx, graphQLErr) // Explicitly ignore error for graceful handling
 	}
-	return utils.NewToolResultErrorFromErr(message, err)
+	return mcpresult.NewErrorFromErr(message, err)
 }
 
-// NewGitHubRawAPIErrorResponse returns an mcp.NewToolResultError and retains the error in the context for access via middleware
+// NewGitHubRawAPIErrorResponse returns an mcp.CallToolResult and retains the error in the context for access via middleware
 func NewGitHubRawAPIErrorResponse(ctx context.Context, message string, resp *http.Response, err error) *mcp.CallToolResult {
 	rawErr := newGitHubRawAPIError(message, resp, err)
 	if ctx != nil {
 		_, _ = addRawAPIErrorToContext(ctx, rawErr) // Explicitly ignore error for graceful handling
 	}
-	return utils.NewToolResultErrorFromErr(message, err)
+	return mcpresult.NewErrorFromErr(message, err)
 }
 
 // NewGitHubAPIStatusErrorResponse handles cases where the API call succeeds (err == nil)