chore(web): migrate CircleIconButton to @immich/ui IconButton (#18486)

* remove import and referenced file

* first pass at replacing all CircleIconButtons

* fix linting issues

* fix combobox formatting issues

* fix button context menu coloring

* remove circle icon button from search history box

* use theme switcher from UI lib

* dark mode force the asset viewer icons

* fix forced dark mode icons

* dark mode memory viewer icons

* fix: back button in memory viewer

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

web/src/routes/admin/library-management/+page.svelte

@@ -329,9 +329,10 @@
                     align="top-right"
                     direction="left"
                     color="primary"
-                    size="16"
+                    size="medium"
                     icon={mdiDotsVertical}
                     title={$t('library_options')}
+                    variant="filled"
                   >
                     <MenuOption onClick={() => onScanClicked(library)} text={$t('scan_library')} />
                     <hr />