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/hooks/useFetchItems.ts

@@ -440,7 +440,7 @@ function groupsUpcomingEpisodes(items: ItemDto[]) {
                         month: 'short',
                         day: 'numeric'
                     });
-            } catch (err) {
+            } catch {
                 console.error('error parsing timestamp for upcoming tv shows');
             }
         }