feat: initial commit of ndef crate

[badrbouslikhin]

This PR introduces the ndef crate, offering a lightweight, no_std compatible parser for NDEF messages. It supports parsing and serializing both Capability Containers (CC) and NDEF messages using fixed-size buffers.

It currently provides basic functionality, but is missing a few features, most importantly:

• Multiple NDEF Records Support: support for parsing and building multiple NDEF records within a single buffer.
• Payload decoding/encoding: support for decoding/encoding specific payload types like URIs, MIME types, and more. Only ExternalType is currently supported.
• Extended Tag Compatibility: Improve compatibility with a wider range of NFC tags beyond ST25DV for which this was originally written.

I know this is uncalled for, but I thought it might be of interest.
Please let me know if this doesn't fit here or needs any adjustments.