feat: add search and refactor modal (#19)

* add find button to sidebar

* update

* improve search

* add error msg

crates/ui/src/icon.rs

@@ -59,6 +59,7 @@ pub enum IconName {
     Relays,
     ResizeCorner,
     Search,
+    SearchFill,
     Settings,
     SortAscending,
     SortDescending,
@@ -128,6 +129,7 @@ impl IconName {
             Self::Relays => "icons/relays.svg",
             Self::ResizeCorner => "icons/resize-corner.svg",
             Self::Search => "icons/search.svg",
+            Self::SearchFill => "icons/search-fill.svg",
             Self::Settings => "icons/settings.svg",
             Self::SortAscending => "icons/sort-ascending.svg",
             Self::SortDescending => "icons/sort-descending.svg",