Promote the v2 README to README.md ahead of the first v2 beta (#3014)

examples/README.md

@@ -4,9 +4,9 @@
   example per protocol feature, each with its own README. Start with
   [`stories/tools/`](stories/tools/); the [stories README](stories/README.md)
   has the full table and how to run them.
-- [`snippets/`](snippets/) — short extracts embedded into `README.v2.md`. Kept
-  minimal and in sync with the top-level README; not intended to be run
-  standalone.
+- [`snippets/`](snippets/) — short extracts that were embedded into the v1
+  README (now on the `v1.x` branch); superseded by `docs_src/`, which the docs
+  and README embed today. Retained pending consolidation into `stories/`.
 - [`servers/everything-server/`](servers/everything-server/) — the conformance
   target for the cross-SDK
   [conformance suite](https://github.com/modelcontextprotocol/conformance).
@@ -15,8 +15,8 @@
   migration guide; superseded by `stories/` and slated for removal.
 - [`clients/`](clients/) and the remaining [`servers/`](servers/) directories
   (`simple-*`, `sse-polling-demo`, `structured-output-lowlevel`) — standalone
-  v1-era projects still linked from `README.v2.md`; retained pending
-  consolidation into `stories/`.
+  v1-era projects retained pending consolidation into `stories/` (the
+  `simple-auth` pair is still linked from `docs/advanced/`).
 
 For real-world servers see the
 [servers repository](https://github.com/modelcontextprotocol/servers).