onboarding: Add design adjustments (#35480)

Release Notes:

- N/A

---------

Co-authored-by: Anthony <anthony@zed.dev>

crates/icons/src/icons.rs

@@ -107,6 +107,12 @@ pub enum IconName {
     Disconnected,
     DocumentText,
     Download,
+    EditorAtom,
+    EditorCursor,
+    EditorEmacs,
+    EditorJetBrains,
+    EditorSublime,
+    EditorVsCode,
     Ellipsis,
     EllipsisVertical,
     Envelope,
@@ -229,6 +235,7 @@ pub enum IconName {
     Server,
     Settings,
     SettingsAlt,
+    ShieldCheck,
     Shift,
     Slash,
     SlashSquare,