chore(docs): make changelogs visible on docsrs

Split changelog file to make it more comprehensible when reading and
also make it a part of documentation so it'll be more discoverable
by the users. This change also makes it possible for rust code inside
the changelogs to be tested with `cargo`.

Co-authored-by: Kirill Chibisov <contact@kchibisov.com>

src/changelog/v0.17.md

@@ -0,0 +1,23 @@
+## 0.17.2
+
+- On macOS, fix `<C-Tab>` so applications receive the event.
+- On macOS, fix `<Cmd-{key}>` so applications receive the event.
+- On Wayland, key press events will now be repeated.
+
+## 0.17.1
+
+- On X11, prevent a compilation failure in release mode for versions of Rust greater than or equal to 1.30.
+- Fixed deadlock that broke fullscreen mode on Windows.
+
+## 0.17.0
+
+- Cocoa and core-graphics updates.
+- Fixed thread-safety issues in several `Window` functions on Windows.
+- On MacOS, the key state for modifiers key events is now properly set.
+- On iOS, the view is now set correctly. This makes it possible to render things (instead of being stuck on a black screen), and touch events work again.
+- Added NetBSD support.
+- **Breaking:** On iOS, `UIView` is now the default root view. `WindowBuilderExt::with_root_view_class` can be used to set the root view objective-c class to `GLKView` (OpenGLES) or `MTKView` (Metal/MoltenVK).
+- On iOS, the `UIApplication` is not started until `Window::new` is called.
+- Fixed thread unsafety with cursor hiding on macOS.
+- On iOS, fixed the size of the `JmpBuf` type used for `setjmp`/`longjmp` calls. Previously this was a buffer overflow on most architectures.
+- On Windows, use cached window DPI instead of repeatedly querying the system. This fixes sporadic crashes on Windows 7.