This re-works the portable `run()` API that consumes the `EventLoop` and
runs the loop on the calling thread until the app exits.
This can be supported across _all_ platforms and compared to the
previous `run() -> !` API is now able to return a `Result` status on all
platforms except iOS and Web. Fixes: #2709
By moving away from `run() -> !` we stop calling `std::process::exit()`
internally as a means to kill the process without returning which means
it's possible to return an exit status and applications can return from
their `main()` function normally.
This also fixes Android support where an Activity runs in a thread but
we can't assume to have full ownership of the process (other services
could be running in separate threads).
Additionally all examples have generally been updated so that `main()`
returns a `Result` from `run()`
Fixes: #2709
* Improve web example
* Implement basic logger into the example webpage
* Repace bash script with xtask
* replace wasm-bindgen-cli with wasm-bindgen-cli-support
* refactor
* Move logic into external crate.
* Remove CI changes
* Review feedback
* examples: Fix unused `Result` that must be used when initializing console_log
* examples: Fix unused imports
* Fix unread name field warning in linux x11 ime InputMethod struct
* Fix unread name field warning in linux x11 Device struct
* Ignore unread field warning in macos/ios MonitorHandle struct
* ci: Add `--deny warnings` to `RUSTFLAGS`
* Remove support for `stdweb`
* Expunge `stdweb`; make `web-sys` the default
* Mark this change as a breaking change
* Re-insert accidental removal of space
* Use the correct cargo feature syntax
* Re-add some `cfg` attributes
* Remove `web-sys` feature from CI
