[@xstate/store] Update Alien Signals implementation (#5437)

* Update alien implementation

* Changeset

* Knip

* Remove unused import

Author: davidkpiano

.changeset/lemon-squids-create.md

@@ -0,0 +1,5 @@
+---
+'@xstate/store': patch
+---
+
+Update the internal atom implementation (alien-signals)

.knip.jsonc

@@ -30,7 +30,9 @@
     "packages/**/{true,false}.ts",
     // file acts as a type test
     "packages/xstate-svelte/test/interpreterAsReadable.svelte",
-    "docs/**"
+    "docs/**",
+    // copy-pasted implementation from alien-signals
+    "packages/xstate-store/src/alien.ts"
   ],
   "ignoreBinaries": ["svelte-check", "docs:build"],
   "ignoreDependencies": [

package.json

@@ -33,6 +33,8 @@
     "test:watch": "vitest",
     "test:core": "vitest run --project xstate",
     "test:core:watch": "vitest --project xstate",
+    "test:store": "vitest run --project @xstate/store",
+    "test:store:watch": "vitest --project @xstate/store",
     "changeset": "changeset",
     "release": "pnpm -r publish --access=public && changeset tag",
     "version": "changeset version"