Migrate from ESLint to oxlint

[kmcginnes]

Description

Migrates the project linting toolchain from ESLint to oxlint, with ESLint retained only for React Compiler rules.

• Replace ESLint with oxlint as the primary linter (112 rules, ~2s vs ~21s)
• Add type-aware linting via oxlint-tsgolint to restore all typescript-eslint/recommendedTypeChecked rules including switch-exhaustiveness-check
• Move import sorting from perfectionist/sort-imports to oxfmt sortImports with matching group configuration
• Retain ESLint only for the 14 React Compiler rules (react-hooks/refs, react-hooks/purity, etc.) that require compiler integration
• Use eslint-plugin-oxlint to auto-disable ESLint rules already covered by oxlint
• Add 31 bonus rules from oxc, unicorn, and typescript plugins that pass with zero violations
• Pin linting dependencies to exact versions since oxlint JS plugins are alpha
• Convert eslint-disable comments to oxlint-disable (or back to eslint-disable for React Compiler rules)

Benchmark

Metric	Before (ESLint)	After (oxlint + ESLint)
Wall clock	~21s	~8s
Rules	~106	112 native + 14 compiler

Note for contributors

After this change, VS Code users should install the oxc extension for in-editor lint feedback. ESLint extension will still work for the React Compiler rules.

Validation

• pnpm checks passes (lint, format, types)
• pnpm test passes (153 files, 1660 tests)
• Import sorting matches upstream/main (only 16 files differ, all comment-only changes)
• Reviewed by 3 independent AI reviewers (sonnet, opus, deepseek)

Related Issues

• Next part Enable default oxlint correctness rules #1747

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0 license.
• I have verified pnpm checks passes with no errors.
• I have verified pnpm test passes with no failures.
• I have covered new added functionality with unit tests if necessary.
• I have updated documentation if necessary.