chore: adding vue client sdk wrapper

[joker23]

Additional changes:

• modified tsconfig.json to match the rest of the monorepo

---

Note

Low Risk
New package scaffolding and client wrapper with no changes to existing SDKs; behavior is covered by unit tests and mirrors the established React wrapper pattern.

Overview
Introduces the first real Vue client SDK surface by replacing the empty package export with a createClient wrapper around @launchdarkly/js-client-sdk, following the same pattern as the React wrapper.

The wrapper injects vue-client-sdk wrapper metadata, tracks initialization state (initializing / complete / failed), exposes isReady, getInitializationError, and subscription APIs for init status (with replay for late subscribers) and context changes after successful start() / identify(). Types for LDVueClient, LDVueInstance, and LDVueProviderOptions are added ahead of provider/composables in a follow-up PR.

Package/tooling: adds a workspace dependency on the JS client SDK, enables Jest without passWithNoTests, and adds jsdom / Vue test utils. tsconfig.json is updated to ES2020 and moduleResolution: bundler to match other SDK packages. Unit tests cover wrapper metadata, init lifecycle, subscriber behavior, and identify error paths.

^{Reviewed by Cursor Bugbot for commit bc71f02. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

@launchdarkly/js-sdk-common size report
This is the brotli compressed size of the ESM build.
Compressed size: 26365 bytes
Compressed size limit: 29000
Uncompressed size: 129044 bytes

[github-actions]

@launchdarkly/js-client-sdk size report
This is the brotli compressed size of the ESM build.
Compressed size: 31978 bytes
Compressed size limit: 34000
Uncompressed size: 114243 bytes

[github-actions]

@launchdarkly/js-client-sdk-common size report
This is the brotli compressed size of the ESM build.
Compressed size: 38739 bytes
Compressed size limit: 39000
Uncompressed size: 212244 bytes

[github-actions]

@launchdarkly/browser size report
This is the brotli compressed size of the ESM build.
Compressed size: 179579 bytes
Compressed size limit: 200000
Uncompressed size: 831422 bytes

[joker23]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit bc71f02. Configure here.}

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.