feat: implement space and workspace icons (#1558)

* feat: implement space and workspace icons
- Create reusable AvatarUploader component supporting avatars, space icons, and workspace icons
- Add Sharp package for server-side image resizing and optimization
- Create reusable AvatarUploader component supporting avatars, space icons, and workspace icons
- Support removing icons

* add workspace logo support
- add upload loader
- add white background to transparent image
- other fixes and enhancements

* dark mode

* fixes

* cleanup

apps/client/src/features/attachments/services/index.ts

@@ -0,0 +1,9 @@
+export {
+  uploadIcon,
+  uploadUserAvatar,
+  uploadSpaceIcon,
+  uploadWorkspaceIcon,
+  removeAvatar,
+  removeSpaceIcon,
+  removeWorkspaceIcon,
+} from "./attachment-service.ts";