docs: add brand block with viandante etymology + mapped-graph motif

Position: between the intro paragraph and the Changelog section.
Tagline surfaces project identity (Italian for 'wanderer');
the tiny ASCII map mirrors the renderer's actual output.

README.md

@@ -8,6 +8,23 @@ per ora). Tiene traccia delle stanze visitate e le renderizza come **mappa
 ASCII** on-demand.
 
 
+
+---
+
+> **viandante** — *Italian for "wanderer"*.
+> A telnet client + ASCII mapper for LP-MUDs (FluffOS, Dead Souls),
+> with GMCP vitals/room decoder and append-only session logging.
+
+```
+        [ Town ]  -- n --  [ Bank ]
+            |                |
+            s                e
+            |                |
+        [ Gate ] ---------- [ Inn ]
+```
+
+> *Mapping the world, one step at a time.*
+
 ## Changelog
 
 Le novità di `viandante` rispetto alla release 0.1 (bootstrap del client, prima del rename a `viandante`).