Initialize Rust GPUI browser shell

crates/ely_domain/src/identifiers.rs

@@ -0,0 +1,40 @@
+use std::fmt;
+
+use uuid::Uuid;
+
+macro_rules! entity_id {
+    ($name:ident, $prefix:literal) => {
+        #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+        pub struct $name(String);
+
+        impl $name {
+            #[must_use]
+            pub fn new() -> Self {
+                Self(format!("{}_{}", $prefix, Uuid::now_v7().simple()))
+            }
+
+            #[must_use]
+            pub fn as_str(&self) -> &str {
+                &self.0
+            }
+        }
+
+        impl Default for $name {
+            fn default() -> Self {
+                Self::new()
+            }
+        }
+
+        impl fmt::Display for $name {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                f.write_str(&self.0)
+            }
+        }
+    };
+}
+
+entity_id!(TabId, "tab");
+entity_id!(SpaceId, "space");
+entity_id!(ProfileId, "profile");
+entity_id!(SplitId, "split");
+entity_id!(WebViewId, "webview");