HOLD UNTIL FEATURE AVAILABLE: New Docs for Authcommands feature

[SigmaScott]

Add TOTP DTMF Authentication Documentation

Summary

Adds end-user documentation for the new per-user TOTP (Time-based One-Time Password) DTMF authentication feature in app_rpt. This feature allows node administrators to gate privileged DTMF commands behind a one-
time password verified via any standard authenticator app (Google Authenticator, Authy, FreeOTP, etc.).

Changes

New Pages

• docs/adv-topics/totp-auth.md — Full user guide covering:

  • Feature overview and login flow
  • Configuration (rpt.conf node-level keys, function table entries, privileged command stanzas)
  • Setting up users (secret generation, authenticator app enrollment via manual entry or QR code)
  • Day-to-day radio usage (login, use privileged commands, logout)
  • CLI commands (rpt auth show, rpt auth logout)
  • Operational notes (session behavior, time sync, reloads, disabling)
  • Troubleshooting table

• docs/config/rpt_auth_conf.md — Config file reference for the new rpt_auth.conf user/secret file (format, fields, permissions, examples)

Updated Pages

• docs/config/rpt_conf.md — Added:

  • auth function class section (after COP commands) documenting the auth,a / auth,s / auth,l methods
  • Six new auth_* node-level configuration keys with descriptions, defaults, and ranges

• mkdocs.yml — Added navigation entries for both new pages (TOTP Auth under Advanced Topics, rpt_auth.conf under Config Files)

Testing

• Verified mkdocs build completes without errors
• All internal cross-references resolve correctly

Notes

• Documentation is written for end-users/node operators only; no developer internals are exposed
• Style matches existing manual conventions (admonitions, code blocks, tables, cross-references)

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[Allan-N]

I really like this feature :)

[ve7fet]

Looks good to me!

[mkmer]

LGTM