Full refresh of the stale 2026-03 README. Fixes sub-module names (iso14a not a14, mf not mfc), adds MIFARE Ultralight/NTAG (mfu) and iso15 inventory() with AFI/DSFID filtering, documents live SniffSession/SimSession streaming + tag.sync() live edits + the transponder/sim framework, and the sync-proxy dir()/help()/tab-completion introspection. Every code example verified against the source; hw.led carries a caveat that it needs the pending CMD_LED_CONTROL firmware port.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
