Add example agent tool preview (#28984)

This PR adds an example of rendering previews for tools using the new
Agent ToolCard style.

![CleanShot 2025-04-17 at 13 03
12@2x](https://github.com/user-attachments/assets/d4c7d266-cc32-4038-9170-f3e070fce60e)

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

crates/component/src/component.rs

@@ -201,6 +201,7 @@ pub fn components() -> AllComponents {
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum ComponentScope {
+    Agent,
     Collaboration,
     DataDisplay,
     Editor,
@@ -220,6 +221,7 @@ pub enum ComponentScope {
 impl Display for ComponentScope {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
+            ComponentScope::Agent => write!(f, "Agent"),
             ComponentScope::Collaboration => write!(f, "Collaboration"),
             ComponentScope::DataDisplay => write!(f, "Data Display"),
             ComponentScope::Editor => write!(f, "Editor"),