chore: update project config

[Nr9]

Greptile Overview

Greptile Summary

Consolidated test mocking dependency management by hoisting vitest-mock-extended to the root workspace and removed spread operators from ESLint config arrays.

• Moved vitest-mock-extended from individual packages to root package.json as a shared dev dependency
• Added publicHoistPattern in pnpm-workspace.yaml to ensure vitest-mock-extended is available to all packages
• Updated all ESLint configs to remove spread operators (configs now export single objects instead of arrays)
• Added JSON linting support and .nx/ directory to global ignores
• Removed empty .npmrc file
• Minor dependency reordering in zustand-firestore/package.json

Confidence Score: 5/5

• This PR is safe to merge with no issues found
• All changes are configuration updates that improve dependency management and align with ESLint config updates from @valian/eslint-config. The dependency hoisting pattern follows pnpm best practices, and the ESLint config changes reflect an API update from the config package (configs now export single objects rather than arrays).
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
eslint.config.mjs	5/5	removed spread operators from config imports, added json linting, and excluded .nx/ from linting
package.json	5/5	added vitest-mock-extended as a root dev dependency for shared test mocking
packages/react-firestore/package.json	5/5	removed vitest-mock-extended dependency (now hoisted from root)
packages/react-kitchen-sink/package.json	5/5	removed vitest-mock-extended dependency (now hoisted from root)
packages/react-query-observable/package.json	5/5	removed vitest-mock-extended dependency (now hoisted from root)
packages/rxjs-firebase/package.json	5/5	removed vitest-mock-extended dependency (now hoisted from root)
packages/zustand-firestore/package.json	5/5	removed vitest-mock-extended dependency and reordered @testing-library/react to standard position
pnpm-workspace.yaml	5/5	added publicHoistPattern to hoist vitest-mock-extended to root for all packages

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