fix(branding): use the Caduceus ☤ (U+2624), not the Rod of Asclepius ⚕ (U+2625)

Every inline glyph — CLI banner/status bar/response labels/goodbye, setup
and doctor boxes, gateway update prompts, WhatsApp reply prefix, TUI theme,
locale strings and the docs — used ⚕, the staff of Asclepius (medicine).
Hermes carries the Caduceus ☤. The ASCII-art logo was already correct.

Mechanical swap across 60 files (no logic change); both glyphs are
East-Asian-width Neutral so no layout shifts. Skins that set their own
`response_label` / `goodbye` are unaffected.

Direction from PR #7064 (@bixycler), the earliest of #7064 / #9611 / #15574,
redone against current main.

Fixes #9565

hermes_cli/cli_agent_setup_mixin.py

@@ -347,7 +347,7 @@ class CLIAgentSetupMixin:
         source of truth. True when a provider was configured."""
         from cli import _cprint, logger
         _cprint("")
-        _cprint("⚕ No inference provider is configured yet — let's fix that.")
+        _cprint("☤ No inference provider is configured yet — let's fix that.")
         _cprint("  You'll pick a provider (Nous Portal OAuth is the fastest; "
                 "no API key needed) and a model.")
         try: