[pull] main from Comcast:main - #230

* Migrate from ESLint to oxlint

Replace ESLint with oxlint for JS/TS linting, keeping ESLint only for
markdown (`@eslint/markdown` uses ESLint's language plugin API, which
oxlint does not support).

`.oxlintrc.json` was generated by `@oxlint/migrate --type-aware
--with-nursery` and carries over 545 rules at their original `warn`
severity. `@eslint-react` and `sonarjs` are loaded as `jsPlugins`;
`typescript`, `react` and `vitest` use oxlint's native implementations,
so `typescript-eslint`, `eslint-plugin-react-hooks` and
`@vitest/eslint-plugin` are no longer needed.

Rules that could not be migrated:

- the 13 React Compiler rules (`react-hooks/purity`,
  `preserve-manual-memoization`, …) — oxlint only ships these as an
  experimental bundled `react/react-compiler` rule
- `@eslint-react/no-implicit-key`, `no-leaked-conditional-rendering` and
  `no-unused-props` — oxlint's JS plugin API cannot supply parser
  services, so these throw on every file
- `@typescript-eslint/naming-convention`, `prefer-destructuring`,
  `no-unused-private-class-members`, `require-atomic-updates`, `one-var`

Three suppressions were added for behavioural differences rather than
real defects: `sonarjs/no-redundant-optional` cannot see
`exactOptionalPropertyTypes` without type information, and
`vitest/no-conditional-expect` flags a helper that is not a test block.
The existing directive in `globals.d.ts` moved down a line because
oxlint reports the index signature where ESLint reported the interface.

`@eslint-react/component-hook-factories` was dropped: it does not exist
in that plugin and was silently ignored by ESLint because it was `off`.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

* remove references to .agents

* yaml tweaks

* fix double lint

* settings tweaks

* tweak eslint usage

* disallow br

* add CLAUDE.md symlink

* re-enable typeAware

* enable typeCheck

* symlink -> file

* nude sonarjs

* tweak settings

* tweak rules

* fix CLAUDE.md

* sort rules

* review

* use default categories settings

* npm dedupe

* npm audit fix

* update packages, use ^

* couple tweaks

---------

Co-authored-by: Claude Opus 5 (1M context) <[email protected]>