machine: use new internal/binary package

The encoding/binary package in Go 1.23 imports the slices package, which
results in circular import when imported from the machine package.
Therefore, encoding/binary cannot be used in the machine package.

This commit fixes that by introducing a new internal/binary package that
is just plain Go code without dependencies. It can be safely used
anywhere (including the runtime if needed).

src/machine/machine_atsamd21.go

@@ -10,8 +10,8 @@ import (
 	"bytes"
 	"device/arm"
 	"device/sam"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 	"runtime/interrupt"
 	"unsafe"
 )

src/machine/machine_atsamd51.go

@@ -10,8 +10,8 @@ import (
 	"bytes"
 	"device/arm"
 	"device/sam"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 	"runtime/interrupt"
 	"unsafe"
 )

src/machine/machine_nrf.go

@@ -5,7 +5,7 @@ package machine
 import (
 	"bytes"
 	"device/nrf"
-	"encoding/binary"
+	"internal/binary"
 	"runtime/interrupt"
 	"unsafe"
 )

src/machine/machine_stm32f4.go

@@ -6,8 +6,8 @@ package machine
 
 import (
 	"device/stm32"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 	"math/bits"
 	"runtime/interrupt"
 	"runtime/volatile"

src/machine/machine_stm32l4.go

@@ -4,8 +4,8 @@ package machine
 
 import (
 	"device/stm32"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 	"runtime/interrupt"
 	"runtime/volatile"
 	"unsafe"

src/machine/machine_stm32wlx.go

@@ -6,8 +6,8 @@ package machine
 
 import (
 	"device/stm32"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 	"math/bits"
 	"runtime/interrupt"
 	"runtime/volatile"

src/machine/usb/descriptor/configuration.go

@@ -1,7 +1,7 @@
 package descriptor
 
 import (
-	"encoding/binary"
+	"internal/binary"
 )
 
 const (

src/machine/usb/descriptor/device.go

@@ -1,7 +1,7 @@
 package descriptor
 
 import (
-	"encoding/binary"
+	"internal/binary"
 )
 
 const (

src/machine/usb/descriptor/endpoint.go

@@ -1,7 +1,7 @@
 package descriptor
 
 import (
-	"encoding/binary"
+	"internal/binary"
 )
 
 var endpointEP1IN = [endpointTypeLen]byte{

src/machine/usb/descriptor/hid.go

@@ -2,8 +2,8 @@ package descriptor
 
 import (
 	"bytes"
-	"encoding/binary"
 	"errors"
+	"internal/binary"
 )
 
 var configurationCDCHID = [configurationTypeLen]byte{