🔧 Replace ESLint and Prettier with oxlint and oxfmt

- Drop .eslintrc.cjs and .prettierrc, add .oxlintrc.json and .oxfmtrc.json
- oxlint covers correctness/suspicious/perf/style/restriction categories
  plus import and typescript plugins; oxfmt reads the same .prettierrc-style
  options we had before
- Update lefthook.yml pre-commit jobs to run oxlint/oxfmt instead of
  eslint/prettier
- Update .vscode/extensions.json (oxc replaces eslint/prettier/vitest) and
  settings.json (oxc becomes the default formatter for TS/JS)
- Add 'oxlint', 'oxfmt', 'oxc', 'nodenext' to cspell dictionary
- Rewrite README 'Development' section to describe the new toolchain

lefthook.yml

@@ -1,45 +1,21 @@
-# EXAMPLE USAGE:
-#
-#   Refer for explanation to following link:
-#   https://lefthook.dev/configuration/
-#
-# pre-push:
-#   jobs:
-#     - name: packages audit
-#       tags:
-#         - frontend
-#         - security
-#       run: yarn audit
-#
-#     - name: gems audit
-#       tags:
-#         - backend
-#         - security
-#       run: bundle audit
-#
-# pre-commit:
-#   parallel: true
-#   jobs:
-#     - run: yarn eslint {staged_files}
-#       glob: "*.{js,ts,jsx,tsx}"
-#
-#     - name: rubocop
-#       glob: "*.rb"
-#       exclude:
-#         - config/application.rb
-#         - config/routes.rb
-#       run: bundle exec rubocop --force-exclusion {all_files}
-#
-#     - name: govet
-#       files: git ls-files -m
-#       glob: "*.go"
-#       run: go vet {files}
-#
-#     - script: "hello.js"
-#       runner: node
-#
-#     - script: "hello.go"
-#       runner: go run
+pre-commit:
+    parallel: true
+    jobs:
+        - name: oxlint
+          glob: "*.{ts,tsx,js,jsx,mjs,cjs}"
+          run: npx oxlint {staged_files}
+        - name: oxfmt
+          glob: "*.{ts,tsx,js,jsx,mjs,cjs}"
+          run: npx oxfmt --check {staged_files}
+        - name: cspell
+          run: npx cspell {staged_files}
+        - name: sort-package-json
+          run: npx sort-package-json --check
+        - name: typecheck
+          run: npx tsc --noEmit
+        - name: outdated
+          run: npx check-outdated
+
 commands:
     typecheck:
         run: npm run check:tsc
@@ -48,8 +24,8 @@ commands:
     sort:
         run: npm run check:package
     lint:
-        run: npm run check:eslint
+        run: npm run check:oxlint
     format:
-        run: npm run check:prettier
+        run: npm run check:oxfmt
     outdated:
-        run: npm run check:outdated
+        run: npm run check:outdated