fix: use correct package namespace

Author: HipsterBrown

bus.go

@@ -1,5 +1,5 @@
 // Communication with Feetech servo motors
-package main
+package feetech
 
 import (
 	"errors"

bus_test.go

@@ -1,5 +1,5 @@
 // Unit tests
-package main
+package feetech
 
 import (
 	"testing"

calibration.go

@@ -1,5 +1,5 @@
 // calibration.go - Motor calibration definitions and functionality
-package main
+package feetech
 
 import (
 	"encoding/json"

calibration_test.go

@@ -1,5 +1,5 @@
 // calibration_test.go - Unit tests for motor calibration
-package main
+package feetech
 
 import (
 	"fmt"

errors.go

@@ -1,5 +1,5 @@
 // errors.go - Custom error types for the feetech package
-package main
+package feetech
 
 import "fmt"
 

models.go

@@ -1,5 +1,5 @@
 // models.go - Servo model definitions and specifications
-package main
+package feetech
 
 import "fmt"