restructured code in separated files

src/separator.typ

@@ -0,0 +1,46 @@
+#import "@preview/cetz:0.2.2": draw
+#import "consts.typ": *
+
+#let _sep(name) = {
+  return ((
+    type: "sep",
+    name: name
+  ),)
+}
+
+#let render(x-pos, elmt, y) = {
+  let shapes = ()
+
+  let x0 = x-pos.first() - 20
+  let x1 = x-pos.last() + 20
+  let m = measure(
+    box(
+      elmt.name,
+      inset: (left: 3pt, right: 3pt, top: 5pt, bottom: 5pt)
+    )
+  )
+  let w = m.width / 1pt
+  let h = m.height / 1pt
+  let cx = (x0 + x1) / 2
+  let xl = cx - w / 2
+  let xr = cx + w / 2
+
+  y -= h / 2
+  shapes += draw.line((x0, y), (xl, y))
+  shapes += draw.line((xr, y), (x1, y))
+  y -= 3
+  shapes += draw.line((x0, y), (xl, y))
+  shapes += draw.line((xr, y), (x1, y))
+  shapes += draw.content(
+    ((x0 + x1) / 2, y + 1.5),
+    elmt.name,
+    anchor: "center",
+    padding: (5pt, 3pt),
+    frame: "rect"
+  )
+  y -= h / 2
+  y -= Y-SPACE
+
+  let r = (y, shapes)
+  return r
+}