chore: move react specific eslint configs into react-sdk

[roncohen]

In preparation for adding a Vue.js SDK, we need the React specific lints to only run when needed.

Also fixed a couple of lints uncovered

[Copilot]

Pull Request Overview

In preparation for a future Vue SDK, React-specific ESLint rules and plugins have been extracted into the react‐sdk package so they only apply to React files; the base config was cleaned up, and a Preact config plus lint fixes were added to the browser SDK.

• Moved React & React Hooks rules/plugins from the shared base into packages/react-sdk/eslint.config.js scoped to *.ts/*.tsx.
• Removed React-related settings from packages/eslint-config/base.js and added the missing globals dependency.
• Added eslint-config-preact and adjusted lint configs in the browser SDK; fixed some lint errors in UI components (type rename, template literals).

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/react-sdk/eslint.config.js	New override with React & Hooks rules/plugins scoped to ts/tsx
packages/eslint-config/package.json	Added globals dependency
packages/eslint-config/base.js	Removed React/Hooks rules and plugins from base config
packages/browser-sdk/src/feedback/ui/StarRating.tsx	Renamed the Score type alias to ScoreNumber to avoid a conflict
packages/browser-sdk/src/feedback/ui/FeedbackForm.tsx	Switched string concatenations to template literals for maxHeight
packages/browser-sdk/package.json	Added eslint-config-preact dependency
packages/browser-sdk/eslint.config.js	Introduced Preact-specific ESLint config and rule adjustments