assistant2: Add new icons for create and delete file tool (#27487)

Release Notes:

- N/A

crates/assistant_tools/src/create_file_tool.rs

@@ -46,7 +46,7 @@ impl Tool for CreateFileTool {
     }
 
     fn icon(&self) -> IconName {
-        IconName::File
+        IconName::FileCreate
     }
 
     fn input_schema(&self) -> serde_json::Value {

crates/assistant_tools/src/delete_path_tool.rs

@@ -40,7 +40,7 @@ impl Tool for DeletePathTool {
     }
 
     fn icon(&self) -> IconName {
-        IconName::Trash
+        IconName::FileDelete
     }
 
     fn input_schema(&self) -> serde_json::Value {

crates/icons/src/icons.rs

@@ -100,6 +100,8 @@ pub enum IconName {
     Eye,
     File,
     FileCode,
+    FileCreate,
+    FileDelete,
     FileDoc,
     FileDiff,
     FileGeneric,