chore: enable no-constant-condition eslint rule

[schmanu]

What it solves

Enables no-constant-condition eslint rule which detects constant conditions such as

if ("constant" {
  doSomething()
}

How to test it

Add constant conditions in some code and see a warning appear.

[github-actions]

Branch preview

✅ Deploy successful!

https://eslint_no_constant_condition--webcore.review-web-core.5afe.dev

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

---

^{Report generated by eslint-plus-action}