Complete hf mfu format command

[0x6r1an0y]

Formats a MIFARE Ultralight / NTAG tag for NDEF: writes the Capability Container and an empty
NDEF message. Needed before hf mfu ndefwrite will touch a tag. nfc type2 format alias added.

hf mfu format
hf mfu format -v
hf mfu format --erase
hf mfu format -k FFFFFFFF
hf mfu format -d E1101200 --force

Per-type values and data sheet citations: doc/mfu_ndef_format_notes.md.

[iceman1001]

Nice,
how ever this shouldn't be in "hf mfu" it should only be in "nfc type2" since format would give the wrong impression you are wiping or preparing a tag normally. Not to mention "hf mfu" is starting to have too many commands.

[0x6r1an0y]

You're right about the naming. Would hf mfu ndefformat work instead? That matches what the other chip trees already do hf 14a ndefformat, hf mf ndefformat, hf mfp ndefformat and hf mfu is currently the only one with ndefread/ndefwrite but no ndefformat. The ndef prefix makes the scope obvious without relying on the tree name for context.

nfc type2 format stays either way. If you'd still rather have it only there, I'll drop the hf mfu side.

[iceman1001]

nay you are right. In the name of current consistency if you can rename it ndefformat I will merge it.

then if you are up to it, all ndef functions should be under nfc in its own source code files.

[0x6r1an0y]

Renamed to ndefformat, pushed.

About moving everything under nfc, happy to do it, but it's bigger than this PR. Should I do just hf mfu, or all of them(hf 14a/hf mf/hf mfp) ? It can be a separate PR so this one isn't held up.