Initial node implementation (#4)

Reviewed-on: #4
Co-authored-by: Zack <zack@bfpower.io>
Co-committed-by: Zack <zack@bfpower.io>

src/cell.rs

@@ -0,0 +1,20 @@
+use core::cell::Cell;
+
+/// Provides a view only reference to a [Cell].
+/// Useful alternative to `&Cell` when an API wants to control where a [Cell]s value can be set.
+#[derive(Copy, Clone)]
+pub struct CellView<'a, T: Copy>(&'a Cell<T>);
+
+impl<T: Copy> CellView<'_, T> {
+    #[inline(always)]
+    pub fn get(self) -> T {
+        self.0.get()
+    }
+}
+
+impl<'a, T: Copy> From<&'a Cell<T>> for CellView<'a, T> {
+    #[inline(always)]
+    fn from(value: &'a Cell<T>) -> Self {
+        CellView(value)
+    }
+}