chore: Bring up winit-core crate

Signed-off-by: John Nunley <dev@notgull.net>

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 members = [
     "run-wasm",
-    "winit"
+    "winit",
+    "winit-core"
 ]
 resolver = "2"

winit-core/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "winit-core"
+version = "0.1.0"
+authors = ["The winit contributors"]
+description = "Base types for windowing libraries"
+edition = "2021"
+keywords = ["windowing"]
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/rust-windowing/winit"
+documentation = "https://docs.rs/winit"
+categories = ["gui"]
+rust-version = "1.70.0"
+
+[features]
+default = ["std"]
+std = ["alloc"]
+alloc = []

winit-core/README.md

@@ -0,0 +1,3 @@
+# winit-core - Base types for a windowing system
+
+TODO

winit-core/src/lib.rs

@@ -0,0 +1,11 @@
+//! Base types for a windowing library.
+//! 
+//! This crate contains types, traits and basic functions from [`winit`] that are platform
+//! independent. It is intended to allow for other crates to build abstractions around [`winit`]
+//! without needing to pull in all of [`winit`]'s dependencies, as well as to provide an
+//! interface for alternative backends for [`winit`] to be constructed.
+//! 
+//! [`winit`]: https://docs.rs/winit
+
+#[cfg(any(not(feature = "std"), not(feature = "alloc")))]
+compile_error! { "no-std and no-alloc usage are not yet supported" }

winit/README.md

@@ -0,0 +1 @@
+../README.md