Add tinycbor

.codespellrc

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+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/spell-check/.codespellrc
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = ,
+skip = ./.git,./.licenses,__pycache__,node_modules,./go.mod,./go.sum,./package-lock.json,./poetry.lock,./yarn.lock,./src/tinycbor
+builtin = clear,informal,en-GB_to_en-US
+check-filenames =
+check-hidden =

src/Arduino_TinyCBOR.h

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+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+#pragma once
+
+#include "./tinycbor/cbor-lib.h"

src/tinycbor/README.md

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+# TinyCBOR
+
+This folder contains a copy of the externally managed Intel TinyCBOR repository
+
+The code is based on https://github.com/intel/tinycbor/releases/tag/v0.5.2 with some minor [modifications](patch/patch.diff).

src/tinycbor/cbor-lib.h

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+/* cbor implementation based on Intel tinycbor under MIT license */
+
+#ifndef CBOR_LIB_H
+#define CBOR_LIB_H
+
+/******************************************************************************
+   INCLUDE
+ ******************************************************************************/
+
+#include "src/cbor.h"
+
+/******************************************************************************
+ * DEFINE
+ ******************************************************************************/
+
+#ifndef CHECK_CBOR
+  #define CHECK_CBOR(expr)           \
+    do {                             \
+      CborError error = CborNoError; \
+      error = (expr);                \
+      if (CborNoError != error)      \
+        return error;                \
+    } while(0);
+#endif /* CHECK_CBOR */
+
+#ifndef CHECK_CBOR_MULTI
+  #define CHECK_CBOR_MULTI(expr)          \
+    do {                                  \
+      CborError error = CborNoError;      \
+      error = (expr);                     \
+      if (CborErrorOutOfMemory == error)  \
+        return CborErrorSplitItems;       \
+      if (CborNoError != error)           \
+        return error;                     \
+    } while(0);
+#endif /* CHECK_CBOR_MULTI */
+
+#endif