Add CBOR fields (cborfields.py, cborpacket.py) and tests (#4958)

* Add CBOR fields (cborfields.py, cborpacket.py) and tests

* Remove unused CBOR fields and codecs from cborfields.py

---------

Co-authored-by: Nils Weiss <nils.weiss@dissecto.com>

Author: polybassa

scapy/cbor/__init__.py

@@ -44,6 +44,26 @@
     CBORcodec_SIMPLE_AND_FLOAT,
 )
 
+from scapy.cbor.cborfields import (
+    CBORF_element,
+    CBORF_field,
+    CBORF_UNSIGNED_INTEGER,
+    CBORF_NEGATIVE_INTEGER,
+    CBORF_INTEGER,
+    CBORF_BYTE_STRING,
+    CBORF_TEXT_STRING,
+    CBORF_BOOLEAN,
+    CBORF_NULL,
+    CBORF_UNDEFINED,
+    CBORF_FLOAT,
+    CBORF_ARRAY,
+    CBORF_ARRAY_OF,
+    CBORF_MAP,
+    CBORF_SEMANTIC_TAG,
+    CBORF_optional,
+    CBORF_PACKET,
+)
+
 __all__ = [
     # Exceptions
     "CBOR_Error",
@@ -81,4 +101,25 @@
     "CBORcodec_MAP",
     "CBORcodec_SEMANTIC_TAG",
     "CBORcodec_SIMPLE_AND_FLOAT",
+    # Field base classes
+    "CBORF_element",
+    "CBORF_field",
+    # Scalar fields
+    "CBORF_UNSIGNED_INTEGER",
+    "CBORF_NEGATIVE_INTEGER",
+    "CBORF_INTEGER",
+    "CBORF_BYTE_STRING",
+    "CBORF_TEXT_STRING",
+    "CBORF_BOOLEAN",
+    "CBORF_NULL",
+    "CBORF_UNDEFINED",
+    "CBORF_FLOAT",
+    # Structured fields
+    "CBORF_ARRAY",
+    "CBORF_ARRAY_OF",
+    "CBORF_MAP",
+    "CBORF_SEMANTIC_TAG",
+    # Complex fields
+    "CBORF_optional",
+    "CBORF_PACKET",
 ]