Rename package to scoped @valknar/vpinball-wasm

Reverts the earlier unscoping: an unscoped package on a Gitea npm
registry has no `.npmrc` mapping a consumer can use other than pinning
the exact tarball URL, since Gitea's registry doesn't proxy npmjs.org
and only scoped packages support the standard `@scope:registry=`
config. Scoping restores that: consumers add one `@valknar:registry=`
line and depend on a normal semver range.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012hQoM3jJT1Lx7CMTciMzvD

package.json

@@ -1,6 +1,6 @@
 {
-	"name": "vpinball-wasm",
-	"version": "0.1.0",
+	"name": "@valknar/vpinball-wasm",
+	"version": "0.2.0",
 	"description": "Visual Pinball's engine compiled to WebAssembly - real .vpx tables, real VBScript, WebGL2 rendering, in the browser",
 	"license": "SEE LICENSE IN LICENSE",
 	"type": "module",