Move all crates into a crates directory (#1940)

crates/epaint/src/util/mod.rs

@@ -0,0 +1,19 @@
+mod ordered_float;
+
+pub use ordered_float::*;
+
+/// Hash the given value with a predictable hasher.
+#[inline]
+pub fn hash(value: impl std::hash::Hash) -> u64 {
+    use std::hash::Hasher as _;
+    let mut hasher = ahash::AHasher::default();
+    value.hash(&mut hasher);
+    hasher.finish()
+}
+
+/// Hash the given value with the given hasher.
+#[inline]
+pub fn hash_with(value: impl std::hash::Hash, mut hasher: impl std::hash::Hasher) -> u64 {
+    value.hash(&mut hasher);
+    hasher.finish()
+}