docs: align the READMEs, help and API reference with the current UI (v3.0.1)

- docs/api.md: document GET /api/net-state and POST /api/net-state-refresh
  (state shape, monitored keys, refresh filter, 503); add eid/euicc to
  /api/status; correct the /api/net-sim FPLMN wording (roaming_denied
  appends, attach clears; 5GS files untouched) and its response
  (net_state); move the stray /api/event-send example back into its
  section; refresh the version examples to 3.x.
- README/RUS: Cards — ADM field, the three TARs, the SCP80/SCP81
  fieldsets and the header markers; File Browser — Read raw/Read decoded
  pills, Edit raw, named FCI block, Verify ADM; Profiler — Clone, three
  list tabs; Custom files — root/parent/FID/alias form, canonical paths,
  cascade delete, legacy-path resolution; Phone simulator — three pills,
  eSIM, Network state monitor, Home network button, corrected FPLMN
  wording, proactive-log row content; RU CLI table gaps (--sms-oa/
  --sms-sm-sc, --terminal-profile, --mcc-mnc-list) and the missing
  event-form bullets.
- help EN/RU: three profiler list tabs, 3.x compatibility example.
- Version 3.0.1 (docs release), sw.js simple-v228.

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simple-v227';
+const CACHE = 'simple-v228';
 const URLS = [
   'index.html',
   'help.html',