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/idlewatcher/types/container_status.go

@@ -1,6 +1,6 @@
 package idlewatcher
 
-import gperr "github.com/yusing/goutils/errs"
+import "errors"
 
 type ContainerStatus string
 
@@ -11,4 +11,4 @@ const (
 	ContainerStatusStopped ContainerStatus = "stopped"
 )
 
-var ErrUnexpectedContainerStatus = gperr.New("unexpected container status")
+var ErrUnexpectedContainerStatus = errors.New("unexpected container status")

internal/idlewatcher/types/provider.go

@@ -5,7 +5,6 @@ import (
 
 	"github.com/yusing/godoxy/internal/types"
 	"github.com/yusing/godoxy/internal/watcher/events"
-	gperr "github.com/yusing/goutils/errs"
 )
 
 type Provider interface {
@@ -15,6 +14,6 @@ type Provider interface {
 	ContainerStop(ctx context.Context, signal types.ContainerSignal, timeout int) error
 	ContainerKill(ctx context.Context, signal types.ContainerSignal) error
 	ContainerStatus(ctx context.Context) (ContainerStatus, error)
-	Watch(ctx context.Context) (eventCh <-chan events.Event, errCh <-chan gperr.Error)
+	Watch(ctx context.Context) (eventCh <-chan events.Event, errCh <-chan error)
 	Close()
 }