♻️ Move type-aware config to .oxlintrc.json; use source-level disable directives

Cleaner separation of concerns:
- options.typeAware: true in .oxlintrc.json activates type-aware
  rules declaratively (equivalent to --type-aware CLI flag, but
  the script command stays clean: just 'oxlint ...')
- Remove the 3 type-aware rule disables from .oxlintrc.json
- Add source-level oxlint-disable directives instead:
  - 4x typescript/no-unsafe-type-assertion (pattern.ts: keysMatch
    Object.keys() cast, candidate[] cast; structuralMatcher value
    as S cast; match.ts: handler as ... cast in nextCases)
  - 1x typescript/no-unnecessary-type-parameters (pattern.ts:
    keysMatch <S extends object>)
  - 1x file-level typescript/no-floating-promises in index.test.ts
    (expectTypeOf() is a sync type-assertion library that the
    type-aware linter misidentifies)

Disabling rules at the source (next to the line that needs the
exemption) documents intent more clearly than a global config
override, and makes the trade-off visible to anyone reading the
code. Re-enabling a rule in the future only requires removing the
inline comment, not editing a central config.

README.md

@@ -14,8 +14,8 @@ Pattern matching for TypeScript/ESM environments (F#-style, not regex).
 - **TypeScript 7** — type checker and build (`tsc`).
 - **node --test** + `--experimental-strip-types` — test runner (Node 22.6+, flag dropped on Node 24).
 - **c8** — code coverage for `test:ci`.
-- **oxlint** — Rust-based linter.
-- **oxlint-tsgolint** — type-aware linting via typescript-go (powers `--type-aware` in `oxlint`). Catches unsafe type assertions, unnecessary type parameters, and other type-system issues that regular oxlint can't see.
+- **oxlint** — Rust-based linter. Type-aware rules are enabled via `options.typeAware: true` in `.oxlintrc.json` (powered by `oxlint-tsgolint`).
+- **oxlint-tsgolint** — type-aware linting via typescript-go (declarative via `.oxlintrc.json`, no CLI flag). Catches unsafe type assertions, unnecessary type parameters, and other type-system issues that regular oxlint can't see. Source-level `oxlint-disable` directives are used to silence known false positives (e.g., `expectTypeOf()` in test files).
 - **oxfmt** — Rust-based formatter (Prettier-compatible). Formats JS/TS, JSON/JSONC, YAML, Markdown, MDX, and more; built-in `package.json` key sorting replaces `sort-package-json`.
 - **cspell** — spell checking.
 - **knip** — finds unused dependencies, exports, and files. Scoped via `--include dependencies,exports,files` to skip the noisy `types` category (which produces false positives for libraries whose exported types are part of the public API).