Update to typescript-eslint v8 (#6372)

* Update typescript-eslint to v8

* Disable @typescript-eslint/prefer-optional-chain

This rule now requires type information which is not currently enabled for
the Typescript ESLint checks.

* Remove unused vars

* Disable no-empty-function for line using updated config

* Disable rule for lines that violate updated typescript-eslint rules

* Use void operator to fix no-floating-promises

Co-authored-by: Bill Thornton <thornbill@users.noreply.github.com>

* Use void operator to fix no-floating-promises

Co-authored-by: Bill Thornton <thornbill@users.noreply.github.com>

---------

Co-authored-by: Bill Thornton <thornbill@users.noreply.github.com>

src/components/AppHeader.tsx

@@ -9,7 +9,7 @@ const AppHeader: FC<AppHeaderParams> = ({
 }) => {
     useEffect(() => {
         // Initialize the UI components after first render
-        import('../scripts/libraryMenu');
+        void import('../scripts/libraryMenu');
     }, []);
 
     return (