feat(proj): use typst repr in cetz editor (#399)

projects/cetz-editor/definitions.typ

@@ -0,0 +1,21 @@
+
+#let x-circle(rad: 200, inner-text: "") = {
+  circle((0, 0), radius: rad, name: node-label)
+  debug-label((-rad*0.7, -rad*0.7))
+  content(node-label, inner-text)
+}
+#let x-rect(x: 200, y: none, inner-text: "") = {
+  let y = if y == none {
+    x
+  } else {
+    y
+  }
+  rect((0, 0), (x, y), name: node-label)
+  debug-label((0, 0))
+  content(node-label, inner-text)
+}
+#let x-arrow(start: (0, 10), end: (50, 10), inner-text: "", mark: (end: ">")) = {
+  set-style(mark: (fill: none, size: 14))
+  line(start, end, name: "t", mark: mark)
+  content("t", inner-text)
+}