HawkStorage abstraction added

[Reversean]

Related #151

Added HawkStorage interface which could be used as env-agnositc abstraction to store key-values.

Also HawkLocalStorage implementation based on browser localStorage added.

[Copilot]

Pull request overview

Adds an environment-agnostic storage abstraction to @hawk.so/core and introduces a browser localStorage-backed implementation in @hawk.so/javascript, aligning with the repo’s ongoing split between shared core logic and runtime-specific implementations (Issue #151).

Changes:

• Added HawkStorage interface to @hawk.so/core and exported it from the core entrypoint.
• Added HawkLocalStorage implementation and corresponding unit tests in @hawk.so/javascript.
• Added Vitest coverage support/config updates for the JavaScript package.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
yarn.lock	Adds dependencies for Vitest v8 coverage reporting.
packages/javascript/tsconfig.test.json	Adds Vitest globals types to the test TS config.
packages/javascript/tests/storages/hawk-local-storage.test.ts	Introduces unit tests for the new HawkLocalStorage.
packages/javascript/src/storages/hawk-local-storage.ts	Adds a localStorage-backed HawkStorage implementation.
packages/javascript/package.json	Adds test:coverage script and coverage dependency.
packages/core/src/storages/hawk-storage.ts	Adds the storage interface contract in core.
packages/core/src/index.ts	Exports HawkStorage from the core public entrypoint.

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[FeironoX5]

HawkLocalStorage could be just assigned with localStorage (rolled back, I understood why we need a class wrapping)