chore(eslint): enforce consistent-type-imports across react-components packages

[Copilot]

Enables @typescript-eslint/consistent-type-imports for all **/*.{ts,tsx} files under the vNext ESLint config, ensuring type-only imports always use import type. Auto-fixed ~1263 files across all tag:vNext packages.

Changes

• packages/eslint-plugin/src/configs/react/index.js — adds @typescript-eslint/consistent-type-imports rule (prefer: 'type-imports', disallowTypeAnnotations: false) to the **/*.{ts,tsx} block
• packages/react-components/** and related vNext packages — mass auto-fix converting implicit type imports to explicit import type form

Before / After

// Before
import { ComponentProps, Slot } from '@fluentui/react-utilities';

// After
import type { ComponentProps, Slot } from '@fluentui/react-utilities';