npm: scope cultnet-ts, cultmesh-ts and cultmesh-browser under @gamecult

Unscoped npm names are unclaimed and open to dependency confusion; cultcache-ts was
already @gamecult/cultcache-ts. package.json names, intra-repo dependencies, package-lock,
import specifiers (src, tests, samples, docs/start, first-call docs test), the workspace
list in run-typescript-workspaces, the verify-eve module map and package READMEs now use
the scoped names. Directory names, workspace paths in CI and release tag prefixes are
unchanged. Historical cut docs and past CHANGELOG entries keep the old names.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

packages/cultmesh-browser/test/interop/content-https-reader.ts

@@ -3,7 +3,7 @@
 import { createHash } from "node:crypto";
 import { readFileSync } from "node:fs";
 import { join } from "node:path";
-import { decodeManifest } from "cultnet-ts/content";
+import { decodeManifest } from "@gamecult/cultnet-ts/content";
 import { fetchVerifiedChunk, fetchVerifiedContent, CultMeshContentError } from "../../src/content.js";
 
 const [endpointsJson, manifestsDir, only] = process.argv.slice(2) as [string, string, string | undefined];