build(eslint-config-fluid): update TypeScript ESLint to v8

[tylerbutler]

Update to v8 with breaking changes:

• Replace no-throw-literal with only-throw-error
• Remove deprecated ban-types and no-empty-interface rules
• Add no-restricted-types for null handling

Blocked by

• build(eslint-config-fluid): migrate from eslint-plugin-import to eslint-plugin-import-x #25661 (migrate import plugin)
• build(eslint-config-fluid): migrate to @eslint-community/eslint-plugin-eslint-comments #25662 (migrate eslint-comments)

Blocking

• build(eslint-config-fluid): migrate @rushstack/no-new-null to @typescript-eslint/no-restricted-types #25664 (migrate rushstack no-new-null)
• build(eslint-config-fluid): update unicorn and jsdoc plugins #25665 (update minor dependencies)
• build(eslint-config-fluid): remove unused Rushstack plugins #25666 (remove Rushstack plugins)

[Copilot]

Pull Request Overview

Updates the TypeScript ESLint plugin from v7.18.0 to v8.18.2, adapting configuration to handle breaking changes in the new major version. The update removes deprecated rules and introduces new ones for better TypeScript code quality.

Key changes:

• Upgrade TypeScript ESLint plugin and parser to v8.18.2
• Replace deprecated no-throw-literal with only-throw-error rule
• Remove deprecated ban-types and no-empty-interface rules and their disables
• Add no-restricted-types rule to discourage null usage in favor of undefined

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Updates TypeScript ESLint dependencies to v8.18.2
base.js	Removes deprecated rule configurations and adds new v8-compatible rules

Files not reviewed (1)

• common/build/eslint-config-fluid/pnpm-lock.yaml: Language not supported