Some docs regarding the last model changes in the interpreter

api/sixtyfps-cpp/docs/cpp_migration.md

@@ -10,27 +10,7 @@ In version 0.2.0 we have increased the minimum version of C++. You need to have
 
 If you are building SixtyFPS from source, you need to make sure that your Rust installation is up-to-date. If you have installed Rust using `rustup`, then you can upgrade to the latest Version of Rust by running `rustup update`.
 
-### C++ Interpreter API
-
-#### Callbacks
-
-Callbacks declared in `.60` markup can be invoked from C++ using  {cpp:func}`sixtyfps::interpreter::ComponentInstance::invoke_callback()` or {cpp:func}`sixtyfps::interpreter::ComponentInstance::invoke_global_callback()`. The arguments to the callback at invocation time used to require the use of `sixtyfps::Slice` type. This was changed to use the C++ 20 [`std::span`](https://en.cppreference.com/w/cpp/container/span) type, for easier passing.
-
-Old code:
-
-```cpp
-sixtyfps::Value args[] = { SharedString("Hello"), 42. };
-instance->invoke_callback("foo", sixtyfps::Slice{ args, 2 });
-```
-
-New code:
-
-```cpp
-sixtyfps::Value args[] = { SharedString("Hello"), 42. };
-instance->invoke_callback("foo", args);
-```
-
-#### Models
+### Models
 
 `Model::row_data` returns now a `std::optional<ModelData>` and can thus be used with indices that are out of bounds.
 
@@ -54,3 +34,28 @@ if (value.has_value()) {
     // row index 2 is out of bounds
 }
 ```
+
+### C++ Interpreter API
+
+#### Callbacks
+
+Callbacks declared in `.60` markup can be invoked from C++ using  {cpp:func}`sixtyfps::interpreter::ComponentInstance::invoke_callback()` or {cpp:func}`sixtyfps::interpreter::ComponentInstance::invoke_global_callback()`. The arguments to the callback at invocation time used to require the use of `sixtyfps::Slice` type. This was changed to use the C++ 20 [`std::span`](https://en.cppreference.com/w/cpp/container/span) type, for easier passing.
+
+Old code:
+
+```cpp
+sixtyfps::Value args[] = { SharedString("Hello"), 42. };
+instance->invoke_callback("foo", sixtyfps::Slice{ args, 2 });
+```
+
+New code:
+
+```cpp
+sixtyfps::Value args[] = { SharedString("Hello"), 42. };
+instance->invoke_callback("foo", args);
+```
+
+#### Models
+
+The `Value::Type::Array` has been replaced by `Value::Type::Model`
+