## Summary
Added GitHub Actions workflow and shell script to validate JSON syntax
in repository files, as in the past we have committed locales files with
invalid JSON.
## Changes
- **What**: Added CI workflow for JSON validation with `jq` syntax
checking
- **Dependencies**: CI workflow requires `jq` (pre-installed on
ubuntu-latest runners)
## Review Focus
Script exclusion patterns for TSConfig files and environment variable
override mechanism (`JSON_LINT_EXCLUDES`).
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5837-ci-add-JSON-validation-CI-workflow-27c6d73d365081a199b1d9ae9e4edfa4)
by [Unito](https://www.unito.io)
