middleware: add QCBOR and example

[BabaYB]

Signed-off-by: Yiping Peng [email protected]

Summary

• CBOR is a data format, RFC 7049, just like json format, whose design goals include the possibility of extremely small code size, fairly small message size, and extensibility without the need for version negotiation
• For IoT application, CBOR is a simpler, lighter data format
• QCBOR is a small CBOR encoder/decoder oriented around C and native data representations
• this PR integrate the QCBOR as a new middleware and add an example to show how to use

User Manual

Please reference the example

[fanghuaqi]

Sphinx link check result

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