* Simple Implementation to address #1327 by adding a focused field to the window and related system
* Changing Window update function from bevy_window to bevy_winit.
* Removing unused imports.
the mailbox option doesn't do framelimiting on some devices. we need to rely on vsync for framelimiting until bevy supports framelimiting internally. #1343
The existing snippet fails to compile with:
```
no method named `system` found for fn item `fn(bevy::prelude::Commands) {example_system}` in the current scope
```
The `Texture::convert` function previously was only compiled when
one of the image format features (`png`, `jpeg` etc.) were enabled.
The `bevy_sprite` crate needs this function though, which led
to compilation errors when using `cargo check --no-default-features
--features render`.
Now the `convert` function has no features and the `texture_to_image`
and `image_to_texture` utilites functions are in an unconditionally
compiled module.
* Fix Interaction getting stuck when pressing and releasing mouse button in one frame
* Fix Interaction not resetting in some cases with FocusPolicy::Pass
* use `length_squared` for visible entities
* ortho projection 2d/3d different depth calculation
* use ScalingMode::FixedVertical for 3d ortho
* new example: 3d orthographic
* add normalized orthographic projection
* custom scale for ScaledOrthographicProjection
* allow choosing base axis for ScaledOrthographicProjection
* cargo fmt
* add general (scaled) orthographic camera bundle
FIXME: does the same "far" trick from Camera2DBundle make any sense here?
* fixes
* camera bundles: rename and new ortho constructors
* unify orthographic projections
* give PerspectiveCameraBundle constructors like those of OrthographicCameraBundle
* update examples with new camera bundle syntax
* rename CameraUiBundle to UiCameraBundle
* update examples
* ScalingMode::None
* remove extra blank lines
* sane default bounds for orthographic projection
* fix alien_cake_addict example
* reorder ScalingMode enum variants
* ios example fix
This would highlight how active the community really is at just a glance, which is nice. It will however require an admin of the discord server to activate this under Server Settings->Widget-> enable server widget
- added some missing examples
- changed the order of a few examples (app/empty came after app/empty_default for example)
- added a table with the examples for Android and iOS, like it was done for wasm
see [`issue 1326`](https://github.com/bevyengine/bevy/issues/1326)
* Simplify syntax & lint. Combine apt installations into a single step. Future-proof OS selections.
* Remove caching
* Run clippy within the linux stable build. Parallelize all the builds. Cargo check is unneeded.
* build and run tests on windows and macos
