refactor(errs): migrate from gperr.Error to standard Go error interface

This is a large-scale refactoring across the codebase that replaces the custom
`gperr.Error` type with Go's standard `error` interface. The changes include:

- Replacing `gperr.Error` return types with `error` in function signatures
- Using `errors.New()` and `fmt.Errorf()` instead of `gperr.New()` and `gperr.Errorf()`
- Using `%w` format verb for error wrapping instead of `.With()` method
- Replacing `gperr.Subject()` calls with `gperr.PrependSubject()`
- Converting error logging from `gperr.Log*()` functions to zerolog's `.Err().Msg()` pattern
- Update NewLogger to handle multiline error message
- Updating `goutils` submodule to latest commit

This refactoring aligns with Go idioms and removes the dependency on
custom error handling abstractions in favor of standard library patterns.

internal/homepage/integrations/qbittorrent/client.go

@@ -2,13 +2,13 @@ package qbittorrent
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"net/http"
 	"net/url"
 
 	"github.com/bytedance/sonic"
 	"github.com/yusing/godoxy/internal/homepage/widgets"
-	gperr "github.com/yusing/goutils/errs"
 )
 
 type Client struct {
@@ -46,7 +46,7 @@ func (c *Client) doRequest(ctx context.Context, method, endpoint string, query u
 	}
 
 	if resp.StatusCode != http.StatusOK {
-		return nil, gperr.Errorf("%w: %d %s", widgets.ErrHTTPStatus, resp.StatusCode, resp.Status)
+		return nil, fmt.Errorf("%w: %d %s", widgets.ErrHTTPStatus, resp.StatusCode, resp.Status)
 	}
 
 	return resp, nil