update eslint to v10 and fix linting issues

[cecilialau6776]

What

Javascript

• Remove eslint-config-google
• Add eslint: "^10.12.0"
• Add gts
• Add lint and fix npm scripts

Misc

• Update readme to link OIDC dev creds to the CSH wiki
• Add GitHub CI/CD action to lint with eslint

Why

Conditional needs a Javascript linter.

I installed GTS as a replacement for eslint-config-google.

Test Plan

N/A

Env Vars

N/A

Documentation

N/A

Checklist

• Tested all changes locally

[datadog-computersciencehouse]

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