chore: add ESLint with @typescript-eslint configuration

[czirker]

Summary

• Adds ESLint 8.x with @typescript-eslint parser and recommended rules
• Adds lint script to package.json (npm run lint)
• Initial baseline: 174 lint issues (informational, not blocking)

Task Reference

• Jira: https://chb.atlassian.net/browse/ES-2709
• Parent: https://chb.atlassian.net/browse/ES-2701

Changes Made

• Added .eslintrc.json with recommended TypeScript rules
• Added eslint, @typescript-eslint/parser, @typescript-eslint/eslint-plugin to devDependencies
• Added lint script to package.json

Note

Per policy, lint errors are non-blocking and serve as a baseline for incremental improvement.

Checklist

• ESLint configured with @typescript-eslint
• Lint script works (npm run lint)
• Initial lint errors documented (174 problems)

Made with Cursor

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Note

Low Risk
Low risk: tooling-only changes (lint config + devDependencies) with no runtime or library code modifications.

Overview
Adds a new ESLint baseline for the TypeScript codebase via .eslintrc.json (using @typescript-eslint recommended rules, with a few relaxations like allowing any and warning on unused vars).

Updates package.json to include a lint script (eslint . --ext .ts) and adds eslint/@typescript-eslint/* as dev dependencies; bumps the package version and refreshes package-lock.json to capture the new tooling tree.

^{Written by Cursor Bugbot for commit 24e1c23. This will update automatically on new commits. Configure here.}

[ch-snyk-sa]

✅ Snyk checks have passed. No issues have been found so far.

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✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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