fix(core): move lottieReadiness out of src/runtime so it ships in dist

The "./runtime/lottie-readiness" subpath export claimed to point at
./dist/runtime/adapters/lottieReadiness.js, but the published 0.6.6 and
0.6.7 tarballs never contained that file. Reason: packages/core/tsconfig.json
excludes "src/runtime" (those files run in a browser context and are
bundled separately into the IIFE artifact), so tsc never emitted the
compiled output. Consumers that import the subpath — most notably
@hyperframes/studio's Player.tsx — fail to resolve the module and the
build breaks at the consumer site.

lottieReadiness.ts is a pure helper: takes `unknown`, returns `boolean`,
no DOM or `window` access. It doesn't belong under src/runtime/ in the
first place — that's why the runtime-exclude rule rightly caught it.
Move it to src/lottieReadiness.ts so the standard library build picks
it up. The subpath export name stays "./runtime/lottie-readiness" so
existing consumers (studio) don't need a code change; only the exports
map's underlying file path moves to ./dist/lottieReadiness.{js,d.ts}.

- mv src/runtime/adapters/lottieReadiness.{ts,test.ts} -> src/
- update src/runtime/adapters/lottie.ts re-export path
- update package.json + publishConfig.exports to point at new dist path

Verified: full core test suite passes (862/862), dist now contains
lottieReadiness.{js,d.ts}, studio typechecks against the moved file.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: terencecho

packages/core/package.json

@@ -31,8 +31,8 @@
     },
     "./runtime": "./dist/hyperframe.runtime.iife.js",
     "./runtime/lottie-readiness": {
-      "import": "./src/runtime/adapters/lottieReadiness.ts",
-      "types": "./src/runtime/adapters/lottieReadiness.ts"
+      "import": "./src/lottieReadiness.ts",
+      "types": "./src/lottieReadiness.ts"
     },
     "./studio-api": {
       "import": "./src/studio-api/index.ts",
@@ -78,8 +78,8 @@
       },
       "./runtime": "./dist/hyperframe.runtime.iife.js",
       "./runtime/lottie-readiness": {
-        "import": "./dist/runtime/adapters/lottieReadiness.js",
-        "types": "./dist/runtime/adapters/lottieReadiness.d.ts"
+        "import": "./dist/lottieReadiness.js",
+        "types": "./dist/lottieReadiness.d.ts"
       },
       "./studio-api": {
         "import": "./dist/studio-api/index.js",

…runtime/adapters/lottieReadiness.test.ts packages/core/src/lottieReadiness.test.tspackages/core/src/runtime/adapters/lottieReadiness.test.ts renamed to packages/core/src/lottieReadiness.test.ts packages/core/src/runtime/adapters/lottieReadiness.test.ts renamed to packages/core/src/lottieReadiness.test.ts

@@ -1,6 +1,6 @@
 import type { RuntimeDeterministicAdapter } from "../types";
 import { swallow } from "../diagnostics";
-export { isLottieAnimationLoaded } from "./lottieReadiness";
+export { isLottieAnimationLoaded } from "../../lottieReadiness";
 
 /**
  * Lottie adapter for HyperFrames