profile: copy button polish

- Updated checkmark icon to SF Symbols
- Updated copy icon to one from SF Symbols

Changelog-Changed: Polished profile key copy buttons, added animation
Closes: #619

damus/Assets.xcassets/Profile/ic-copy.imageset/Contents.json

@@ -1,21 +0,0 @@
-{
-  "images" : [
-    {
-      "filename" : "ic-copy.png",
-      "idiom" : "universal",
-      "scale" : "1x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "2x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "3x"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}