Allow rotation of rectangles and ellipses (#7682)

<!--
Please read the "Making a PR" section of
[`CONTRIBUTING.md`](https://github.com/emilk/egui/blob/main/CONTRIBUTING.md)
before opening a Pull Request!

* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
maintainers to test and add commits to your PR.
* Remember to run `cargo fmt` and `cargo clippy`.
* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
* When you have addressed a PR comment, mark it as resolved.

Please be patient! I will review your PR, but my time is limited!
-->

Added the ability to rotate rectangles and ellipses. Similar to the
existing text implementation

* [x ] I have followed the instructions in the PR template

crates/epaint/src/shape_transform.rs

@@ -57,6 +57,7 @@ pub fn adjust_colors(
             radius: _,
             fill,
             stroke,
+            angle: _,
         })
         | Shape::Rect(RectShape {
             rect: _,
@@ -67,6 +68,7 @@ pub fn adjust_colors(
             round_to_pixels: _,
             blur_width: _,
             brush: _,
+            angle: _,
         }) => {
             adjust_color(fill);
             adjust_color(&mut stroke.color);