Ref: stdlib-js/metr-issue-tracker#55

- Add `eslint-plugin-jsonc` and `eslint-plugin-yml` as devDependencies
- Create `etc/eslint/rules/json.js` with 10 rules enforcing JSON spec
  compliance (indent, no-dupe-keys, comma-dangle, etc.)
- Create `etc/eslint/rules/yaml.js` with 12 rules for YAML formatting
  and best practices (indent, block-mapping, quotes as warn, etc.)
- Add 5 config blocks to `eslint.config.cjs`: base JSON, cli_opts.json
  tab override, package.json key ordering (canonical stdlib order),
  base YAML, and GitHub Actions workflow key ordering
- Un-ignore `.github/` and `.codecov.yml` in global ESLint ignores
- Create custom `stdlib/yaml-license-header` rule enforcing Apache-2.0
  license header at the start of YAML files
- Register the new rule in the stdlib ESLint plugin
- Add `.cjs` to the filename linter's supported extensions allowlist
- Add `lint-json` and `lint-yaml` Make targets with `--cache`
- Wire new targets into the top-level `lint` prerequisite

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: passed
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---