refactor: migrate from zerolog to zap logging library

Replace github.com/rs/zerolog with go.uber.org/zap throughout the codebase
to improve performance and provide better structured logging capabilities.

Key changes:
- Replace zerolog imports with zap and zapcore
- Implement custom Logger wrapper in log.go to maintain zerolog-like API
- Add LogEvent struct with chained methods (Str, Int, Err, Bool, etc.)
- Update all logging calls to use the new zap-based wrapper
- Replace JSON encoders with Console encoders for better readability

Benefits:
- Better performance with zap's optimized logging
- Consistent structured logging across all components
- Maintained zerolog-like API for easy migration
- Proper field context preservation for debugging
- Multi-core logging architecture for better output control

All tests pass and build succeeds.

cmd/cli/main_test.go

@@ -5,7 +5,8 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/rs/zerolog"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 
 	"github.com/Control-D-Inc/ctrld"
 )
@@ -13,7 +14,19 @@ import (
 var logOutput strings.Builder
 
 func TestMain(m *testing.M) {
-	l := zerolog.New(&logOutput)
-	mainLog.Store(&ctrld.Logger{Logger: &l})
+	// Create a custom writer that writes to logOutput
+	writer := zapcore.AddSync(&logOutput)
+
+	// Create zap encoder
+	encoderConfig := zap.NewDevelopmentEncoderConfig()
+	encoder := zapcore.NewConsoleEncoder(encoderConfig)
+
+	// Create core that writes to our string builder
+	core := zapcore.NewCore(encoder, writer, zap.DebugLevel)
+
+	// Create logger
+	l := zap.New(core)
+
+	mainLog.Store(&ctrld.Logger{Logger: l})
 	os.Exit(m.Run())
 }