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/v0.8.md

@@ -0,0 +1,33 @@
+## 0.8.3
+
+- Fixed issue of calls to `set_inner_size` blocking on Windows.
+- Mapped `ISO_Left_Tab` to `VirtualKeyCode::Tab` to make the key work with modifiers
+- Fixed the X11 backed on 32bit targets
+
+## 0.8.2
+
+- Uniformize keyboard scancode values across Wayland and X11 (#297).
+- Internal rework of the wayland event loop
+- Added method `os::linux::WindowExt::is_ready`
+
+## 0.8.1
+
+- Added various methods to `os::linux::EventsLoopExt`, plus some hidden items necessary to make
+  glutin work.
+
+## 0.8.0
+
+- Added `Window::set_maximized`, `WindowAttributes::maximized` and `WindowBuilder::with_maximized`.
+- Added `Window::set_fullscreen`.
+- Changed `with_fullscreen` to take a `Option<MonitorId>` instead of a `MonitorId`.
+- Removed `MonitorId::get_native_identifier()` in favor of platform-specific traits in the `os`
+  module.
+- Changed `get_available_monitors()` and `get_primary_monitor()` to be methods of `EventsLoop`
+  instead of stand-alone methods.
+- Changed `EventsLoop` to be tied to a specific X11 or Wayland connection.
+- Added a `os::linux::EventsLoopExt` trait that makes it possible to configure the connection.
+- Fixed the emscripten code, which now compiles.
+- Changed the X11 fullscreen code to use `xrandr` instead of `xxf86vm`.
+- Fixed the Wayland backend to produce `Refresh` event after window creation.
+- Changed the `Suspended` event to be outside of `WindowEvent`.
+- Fixed the X11 backend sometimes reporting the wrong virtual key (#273).