release 0.1.0-beta.2

Bump src/version.ts and package.json together; release.ts refuses to build if
they disagree, or if the git tag disagrees with either.

Also updates the version shown in the README and MCP sample headers, and the
example in development.md so it points at the next release rather than this one.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "shiro-neko",
-  "version": "0.1.0-beta.1",
+  "version": "0.1.0-beta.2",
   "type": "module",
   "private": true,
   "bin": {