Improve source structure in the node api (#6164)

* Update api/node/typescript/models.ts

Co-authored-by: Simon Hausmann <simon.hausmann@slint.dev>

* Code review feedback
---------

Co-authored-by: Simon Hausmann <simon.hausmann@slint.dev>

api/node/rust/interpreter/component_definition.rs

@@ -0,0 +1,79 @@
+// Copyright © SixtyFPS GmbH <info@slint.dev>
+// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
+
+use napi::Result;
+use slint_interpreter::ComponentDefinition;
+
+use super::{JsComponentInstance, JsProperty};
+
+#[napi(js_name = "ComponentDefinition")]
+pub struct JsComponentDefinition {
+    internal: ComponentDefinition,
+}
+
+impl From<ComponentDefinition> for JsComponentDefinition {
+    fn from(definition: ComponentDefinition) -> Self {
+        Self { internal: definition }
+    }
+}
+
+#[napi]
+impl JsComponentDefinition {
+    #[napi(constructor)]
+    pub fn new() -> napi::Result<Self> {
+        Err(napi::Error::from_reason(
+            "ComponentDefinition can only be created by using ComponentCompiler.".to_string(),
+        ))
+    }
+
+    #[napi(getter)]
+    pub fn properties(&self) -> Vec<JsProperty> {
+        self.internal
+            .properties()
+            .map(|(name, value_type)| JsProperty { name, value_type: value_type.into() })
+            .collect()
+    }
+
+    #[napi(getter)]
+    pub fn callbacks(&self) -> Vec<String> {
+        self.internal.callbacks().collect()
+    }
+
+    #[napi(getter)]
+    pub fn functions(&self) -> Vec<String> {
+        self.internal.functions().collect()
+    }
+
+    #[napi(getter)]
+    pub fn globals(&self) -> Vec<String> {
+        self.internal.globals().collect()
+    }
+
+    #[napi]
+    pub fn global_properties(&self, global_name: String) -> Option<Vec<JsProperty>> {
+        self.internal.global_properties(global_name.as_str()).map(|iter| {
+            iter.map(|(name, value_type)| JsProperty { name, value_type: value_type.into() })
+                .collect()
+        })
+    }
+
+    #[napi]
+    pub fn global_callbacks(&self, global_name: String) -> Option<Vec<String>> {
+        self.internal.global_callbacks(global_name.as_str()).map(|iter| iter.collect())
+    }
+
+    #[napi]
+    pub fn global_functions(&self, global_name: String) -> Option<Vec<String>> {
+        self.internal.global_functions(global_name.as_str()).map(|iter| iter.collect())
+    }
+
+    #[napi]
+    pub fn create(&self) -> Result<JsComponentInstance> {
+        Ok(self.internal.create().map_err(|e| napi::Error::from_reason(e.to_string()))?.into())
+    }
+
+    #[napi(getter)]
+    pub fn name(&self) -> String {
+        self.internal.name().into()
+    }
+}