useWarningLogger only runs on the client

[r100-stack]

Changes

An example from examples was failing on the Astro docs site:

This is because useWarningLogger uses window (not available on the server), but in Astro, that component was running on the server.

iTwinUI/packages/itwinui-react/src/utils/hooks/useWarningLogger.ts

Line 47 in e4c1673

timeoutRef.current = window.setTimeout(() => {

So, this PR uses getWindow() instead of window. getWindow() returns undefined when window does not exist instead of giving an error.

iTwinUI/packages/itwinui-react/src/utils/functions/dom.ts

Lines 14 to 20 in e4c1673

	/**
	* Get window if it is defined.
	* Used to support SSR/SSG applications.
	*/
	export const getWindow = () => {
	return typeof window === 'undefined' ? undefined : window;
	};

Testing

• Confirmed that the warnings (e.g. IconButton is missing the ``label`` prop. warning) are still working.
• Confirmed that the new example I was adding that was giving the error on the docs site is now working.

Docs

No changeset needed imo as not a significant change for the user.