refactor: replace Unix socket log communication with HTTP-based system

Replace the legacy Unix socket log communication between `ctrld start` and
`ctrld run` with a modern HTTP-based system for better reliability and
maintainability.

Benefits:
- More reliable communication protocol using standard HTTP
- Better error handling and connection management
- Cleaner separation of concerns with dedicated endpoints
- Easier to test and debug with HTTP-based communication
- More maintainable code with proper abstraction layers

This change maintains backward compatibility while providing a more robust
foundation for inter-process communication between ctrld commands.

log.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"os"
 	"time"
 
 	"go.uber.org/zap"
@@ -244,7 +245,8 @@ func (l *Logger) GetLogger() *Logger {
 
 // Write implements io.Writer to allow direct writing to the logger
 func (l *Logger) Write(p []byte) (n int, err error) {
-	l.Info().Msg(string(p))
+	stdoutSyncer := zapcore.AddSync(os.Stdout)
+	stdoutSyncer.Write(p)
 	return len(p), nil
 }