Add type-aware Oxlint alongside ESLint

[gonzaloriestra]

Why

This is the second step of the ESLint-to-Oxlint migration. It introduces Oxlint as an additional required check so we can establish rule and type-aware parity before changing or removing ESLint.

What changed

• add oxlint and the native oxlint-tsgolint type-aware backend
• migrate 208 compatible ESLint rules into oxlint.json
• run Oxlint before ESLint in full and affected lint commands
• add Oxlint to pull-request and main-branch CI
• keep ESLint as the compatibility backstop while unsupported or behaviorally different rules are evaluated
• temporarily exclude the E2E scripts and UI extension kit packages where TypeScript project configuration is not yet compatible with the native type-aware backend

Validation

• pnpm install --frozen-lockfile
• pnpm lint:oxlint
• pnpm lint
• git diff --check

[gonzaloriestra]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Remove the ESLint compatibility layer #8211
• Close remaining Oxlint parity gaps #8210
• Run local CLI rules with Oxlint #8209
• Make Oxlint the primary linter #8208
• Add type-aware Oxlint alongside ESLint #8206 👈 (View in Graphite)
• Decouple Prettier from ESLint #8204
• main

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