♻️ 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.

package.json

@@ -40,7 +40,7 @@
         "check:knip": "knip --include dependencies,exports,files",
         "check:outdated": "check-outdated --ignore-pre-releases --ignore-packages @oxfmt/binding-darwin-arm64,@oxfmt/binding-darwin-x64,@oxfmt/binding-linux-arm64-gnu,@oxfmt/binding-linux-arm64-musl,@oxfmt/binding-linux-x64-gnu,@oxfmt/binding-linux-x64-musl,@oxfmt/binding-win32-x64-msvc,@oxlint/binding-darwin-arm64,@oxlint/binding-darwin-x64,@oxlint/binding-linux-arm64-gnu,@oxlint/binding-linux-arm64-musl,@oxlint/binding-linux-x64-gnu,@oxlint/binding-linux-x64-musl,@oxlint/binding-win32-x64-msvc,@oxlint-tsgolint/darwin-arm64,@oxlint-tsgolint/darwin-x64,@oxlint-tsgolint/linux-arm64,@oxlint-tsgolint/linux-x64,@oxlint-tsgolint/win32-arm64,@oxlint-tsgolint/win32-x64",
         "check:oxfmt": "oxfmt --check ${LEFTHOOK_FILES:-.}",
-        "check:oxlint": "oxlint --type-aware ${LEFTHOOK_FILES:-src}",
+        "check:oxlint": "oxlint ${LEFTHOOK_FILES:-src}",
         "check:tsc": "tsc",
         "clean": "node -e \"fs.rmSync('dist', { recursive: true, force: true })\"",
         "fix:oxfmt": "oxfmt ${LEFTHOOK_FILES:-.}",