fix: add download attribute to fix JAR files saving as ZIP in Chromium (#6065)

* fix: add download attribute to fix JAR files saving as ZIP in Chromium

- JAR files were downloading with a `.zip` extension in Chromium-based browsers (Chrome, Edge, Arc, Brave, Opera, Vivaldi)
- Root cause: JAR files are ZIP archives internally, so Chromium sniffs the `Content-Type` as `application/zip` and overrides the filename extension when no `download` attribute is present
- Fix: add `download="<filename>"` to all file download `<a>` tags so the browser uses the original filename from the API

* fix: add download attribute to remaining download links

Missed in initial pass: changelog page button, versions overflow
menu, settings/versions overflow menu. Also adds `download` prop
to Button and OverflowMenu to support dropdown link items.

Adds missing `getPrimaryFile` definition in changelog.vue.

---------

Co-authored-by: Mr_chank <180248271+chank-op@users.noreply.github.com>
Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>

packages/ui/src/components/base/OverflowMenu.vue

@@ -36,6 +36,7 @@
 							: undefined
 					"
 					:link="option.link ? option.link : undefined"
+					:download="option.download ? option.download : undefined"
 					:external="option.external ? option.external : false"
 					:disabled="option.disabled"
 					@click="
@@ -76,6 +77,7 @@ interface Item extends BaseOption {
 	icon?: Component
 	action?: (event?: MouseEvent) => void
 	link?: string
+	download?: string
 	external?: boolean
 	color?:
 		| 'primary'