Map "feature upsell" events to the new "Noun Verbed" format (#20787)

Release Notes:

- N/A

crates/collab/src/api/events.rs

@@ -1520,7 +1520,22 @@ fn for_snowflake(
                         properties["is_first_for_channel"] = json!(true);
                         "App First Opened For Release Channel".to_string()
                     }
-                    _ => format!("Unknown App Event: {}", e.operation),
+                    "feature upsell: toggle vim" => {
+                        properties["source"] = json!("Feature Upsell");
+                        "Vim Mode Toggled".to_string()
+                    }
+                    _ => e
+                        .operation
+                        .strip_prefix("feature upsell: viewed docs (")
+                        .and_then(|s| s.strip_suffix(')'))
+                        .map_or_else(
+                            || format!("Unknown App Event: {}", e.operation),
+                            |docs_url| {
+                                properties["url"] = json!(docs_url);
+                                properties["source"] = json!("Feature Upsell");
+                                "Documentation Viewed".to_string()
+                            },
+                        ),
                 };
                 (event_type, properties)
             }