Add support for mapping image properties

This exposes a slint.Image class, which has a load_from_path class
method as well as size/width/height properties.

cc #4202

api/python/image.rs

@@ -0,0 +1,55 @@
+// Copyright © SixtyFPS GmbH <info@slint.dev>
+// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial
+
+use pyo3::prelude::*;
+
+#[pyclass(unsendable)]
+pub struct PyImage {
+    pub image: slint_interpreter::Image,
+}
+
+#[pymethods]
+impl PyImage {
+    #[new]
+    fn py_new() -> PyResult<Self> {
+        Ok(Self { image: Default::default() })
+    }
+
+    #[getter]
+    fn size(&self) -> PyResult<(u32, u32)> {
+        Ok(self.image.size().into())
+    }
+
+    #[getter]
+    fn width(&self) -> PyResult<u32> {
+        Ok(self.image.size().width)
+    }
+
+    #[getter]
+    fn height(&self) -> PyResult<u32> {
+        Ok(self.image.size().height)
+    }
+
+    #[getter]
+    fn path(&self) -> PyResult<Option<&std::path::Path>> {
+        Ok(self.image.path())
+    }
+
+    #[staticmethod]
+    fn load_from_path(path: std::path::PathBuf) -> Result<Self, crate::errors::PyLoadImageError> {
+        let image = slint_interpreter::Image::load_from_path(&path)?;
+        Ok(Self { image })
+    }
+
+    #[staticmethod]
+    fn load_from_svg_data(data: &[u8]) -> Result<Self, crate::errors::PyLoadImageError> {
+        let image = slint_interpreter::Image::load_from_svg_data(data)?;
+        Ok(Self { image })
+    }
+}
+
+impl From<&slint_interpreter::Image> for PyImage {
+    fn from(image: &slint_interpreter::Image) -> Self {
+        Self { image: image.clone() }
+    }
+}