Use a code generator to update CborKnownTags enum list from IANA

[mofosyne]

Created https://github.com/mofosyne/iana-headers/blob/main/cbor/c/cbor-constants.h#L22-L31 but noticed that

tinycbor/src/cbor.h

Lines 105 to 128 in 04b306c

	typedef enum CborKnownTags {
	CborDateTimeStringTag = 0,
	CborUnixTime_tTag = 1,
	CborPositiveBignumTag = 2,
	CborNegativeBignumTag = 3,
	CborDecimalTag = 4,
	CborBigfloatTag = 5,
	CborCOSE_Encrypt0Tag = 16,
	CborCOSE_Mac0Tag = 17,
	CborCOSE_Sign1Tag = 18,
	CborExpectedBase64urlTag = 21,
	CborExpectedBase64Tag = 22,
	CborExpectedBase16Tag = 23,
	CborEncodedCborTag = 24,
	CborUrlTag = 32,
	CborBase64urlTag = 33,
	CborBase64Tag = 34,
	CborRegularExpressionTag = 35,
	CborMimeMessageTag = 36,
	CborCOSE_EncryptTag = 96,
	CborCOSE_MacTag = 97,
	CborCOSE_SignTag = 98,
	CborSignatureTag = 55799
	} CborKnownTags;

has a different naming approach so it's not directly adaptable to use my existing codegenerator (written in python).

Also it doesn't seem like the enum is directly referenced in the code so am proposing to add a iana-cbor-constant.h so you can still keep the existing CborKnownTags for backwards compatibility. Other option is to manually adapt the python code to match tinycbor naming convention.

[thiagomacieira]

Adapting the naming from your generator shouldn't be too difficult, though.

[mofosyne]

Okay gave it a shot https://github.com/intel/tinycbor/pull/241/files