refactor: reorganize internal files into src/internal/{codec,protocol} (#21)

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Co-authored-by: petesramek <2333452+petesramek@users.noreply.github.com>

Author: Copilot

src/TinyLink.h

@@ -7,13 +7,13 @@
 #define TINY_LINK_H
 
 #include "TinyProtocol.h"
-#include "CobsCodec.h"
-#include "Fletcher16.h"
-#include "Packet.h"
+#include "internal/codec/CobsCodec.h"
+#include "internal/codec/Fletcher16.h"
+#include "internal/codec/Packet.h"
 #include "version.h"
-#include "protocol/internal/AckMessage.h"
-#include "protocol/internal/LogMessage.h"
-#include "protocol/internal/HandshakeMessage.h"
+#include "internal/protocol/AckMessage.h"
+#include "internal/protocol/LogMessage.h"
+#include "internal/protocol/HandshakeMessage.h"
 #include "protocol/LogLevel.h"
 #include <stdint.h>
 #include <string.h>

src/TinyProtocol.h

@@ -5,8 +5,8 @@
  * Payload wire-format headers (TinyAck, LogMessage) are internal
  * implementation details and are not re-exported here. Include them
  * explicitly from their internal paths if needed:
- *   #include "protocol/internal/AckMessage.h"
- *   #include "protocol/internal/LogMessage.h"
+ *   #include "internal/protocol/AckMessage.h"
+ *   #include "internal/protocol/LogMessage.h"
  */
 
 #ifndef TINY_PROTOCOL_H

src/CobsCodec.cpp src/internal/codec/CobsCodec.cppsrc/CobsCodec.cpp renamed to src/internal/codec/CobsCodec.cpp

@@ -11,7 +11,7 @@
 
 #include <stdint.h>
 #include "protocol/Status.h"
-#include "protocol/internal/Packed.h"
+#include "internal/protocol/Packed.h"
 
 namespace tinylink {
 

src/CobsCodec.h src/internal/codec/CobsCodec.hsrc/CobsCodec.h renamed to src/internal/codec/CobsCodec.h

@@ -10,7 +10,7 @@
 #define TINYLINK_INTERNAL_HANDSHAKEMESSAGE_H
 
 #include <stdint.h>
-#include "protocol/internal/Packed.h"
+#include "internal/protocol/Packed.h"
 
 namespace tinylink {