wip: rewrite core to be template focused

packages/core/src/bump_frame.rs

@@ -0,0 +1,24 @@
+use std::cell::Cell;
+
+use bumpalo::Bump;
+
+use crate::nodes::VTemplate;
+
+pub struct BumpFrame {
+    pub bump: Bump,
+    pub node: Cell<*const VTemplate<'static>>,
+}
+impl BumpFrame {
+    pub fn new(capacity: usize) -> Self {
+        let bump = Bump::with_capacity(capacity);
+        Self {
+            bump,
+            node: Cell::new(std::ptr::null()),
+        }
+    }
+
+    pub fn reset(&mut self) {
+        self.bump.reset();
+        self.node.set(std::ptr::null());
+    }
+}