chore: add file extensions to lint-js script and fix the existing linting errors

[chillkang]

Done

• Related to chore: integrate eslint-plugin-jsx-a11y into the existing ESLint setup #4764
• Add file extensions, .js, .ts, .jsx, .tsx, to lint-js script
• Fix the existing linting issues with --fix option, prettier, added rules, e.g., "react/react-in-jsx-scope": "off".

How to QA

• lint-js check should be failing since there are other linting issues left (828 errors).
• The changes I added are in the first two files, .eslintrc.js and package.json.
• The rest of the changes are the fixed linting errors.

Testing

• This PR has tests
• No testing required (explain why): Changes to ESLint configurations

Issue / Card

Fixes #https://warthogs.atlassian.net/browse/WD-13579

[webteam-app]

Demo

Jenkins

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