fix(core): allow duplicate qwik via shared singletons

[wmertens]

Another step towards QwikDev/qwik-evolution#318

[changeset-bot]

🦋 Changeset detected

Latest commit: c0af151

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@qwik.dev/core	Patch
eslint-plugin-qwik	Patch
@qwik.dev/react	Patch
@qwik.dev/router	Patch
create-qwik	Patch

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commit: c0af151

[Copilot]

Pull request overview

This PR refactors selected mutable runtime state into a version-aware global singleton registry so same-version Qwik copies can share state, primarily to support externalized third-party Qwik libraries on the server without tripping duplicate-runtime issues.

Changes:

• Added a new shared/singletons registry on globalThis.__qwik__ and moved several runtime registries/state holders to use it.
• Updated server/testing symbol resolution and build-time allowlists so the new singleton/version plumbing can be imported in server/optimizer builds.
• Added/updated tests and a changeset describing the shared-singleton behavior.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
scripts/submodule-server.ts	Allows core/version imports in the server submodule build.
scripts/submodule-optimizer.ts	Allows core/version imports in the optimizer submodule build.
packages/qwik/src/testing/platform.ts	Switches test symbol lookup to the shared singleton registry.
packages/qwik/src/server/qwik-copy.ts	Re-exports the singleton accessor for server runtime code.
packages/qwik/src/server/platform.unit.ts	Updates server platform tests to use _regSymbol/new global state.
packages/qwik/src/server/platform.ts	Switches server symbol lookup/chunk mapping checks to shared singletons.
packages/qwik/src/core/use/use-locale.ts	Moves locale and async-local storage handles into singleton-backed state.
packages/qwik/src/core/shared/singletons.ts	Introduces the new global singleton registry and duplicate-version check.
packages/qwik/src/core/shared/serdes/inflate.ts	Moves deserialization loading state into the singleton registry.
packages/qwik/src/core/shared/serdes/deser-proxy.ts	Moves deserializer proxy cache into the singleton registry.
packages/qwik/src/core/shared/serdes/allocate.ts	Moves deserialization resolver/store-target maps into the singleton registry.
packages/qwik/src/core/shared/qrl/qrl.ts	Registers inline QRL symbols via the singleton-backed registry.
packages/qwik/src/core/shared/qrl/qrl-class.ts	Reads the singleton-backed deserialization loading state.
packages/qwik/src/core/index.ts	Replaces inline duplicate-import guard with singleton module side effect import.
.changeset/shared-singletons-global.md	Records the patch release note for shared global singletons.

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[wmertens]

hmm _captures is also a singleton, we need to change it to a holder object