Added some electrical components

src/elements/electrical/resistor.typ

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+#import "@preview/cetz:0.3.2": draw, coordinate
+#import "../element.typ"
+#import "../ports.typ": add-port
+
+#let draw-shape(
+  id, tl, tr, br, bl,
+  fill, stroke,
+  zigzags: 6,
+  vertical: false
+) = {
+  let (x0, y0) = tl
+  let (x1, y1) = br
+
+  let w = x1 - x0
+  let h = y1 - y0
+
+  let (o0, s0) = if vertical {(y0, h)} else {(x0, w)}
+  let (o1, s1) = if vertical {(x0, w)} else {(y0, h)}
+  let m1 = o1 + s1 / 2
+
+  let pt(i, j) = if vertical {
+    (j, i)
+  } else {
+    (i, j)
+  }
+
+  let p0 = pt(o0, m1)
+  let p1 = pt(o0 + 0.2 * s0, m1)
+  let p2 = pt(o0 + 0.8 * s0, m1)
+  let p3 = pt(o0 + s0, m1)
+
+  // Draw rectangle (IEC standard) if zigzags is none
+  if zigzags == none {
+    let rect_height = s1 / 2
+    let rect_top = m1 - rect_height / 2
+    let rect_bottom = m1 + rect_height / 2
+    let p4 = pt(o0 + 0.2 * s0, rect_top)
+    let p5 = pt(o0 + 0.8 * s0, rect_bottom)
+    let f = draw.group(name: id, {
+      draw.line(p0, p1)
+      draw.line(p2, p3)
+      draw.rect(p4, p5, stroke: stroke, fill: fill)
+    })
+    return (f, tl, tr, br, bl)
+  }
+  // Draw zigzags (ANSI standard) if zigzags is an integer
+  else if type(zigzags) == int {
+    let pts = (p0, p1)
+    
+    for i in range(zigzags) {
+      let r = ((i+0.5) / zigzags * 0.6 + 0.2)
+      let pos = pt(o0 + r * s0, o1 + s1 * calc.rem(i, 2))
+      pts.push(pos)
+    }
+  
+    pts += (p2, p3)
+  
+    let f = draw.group(name: id, {
+      draw.line(..pts, stroke: stroke)
+    })
+    return (f, tl, tr, br, bl)
+  }
+  // Fallback or error? For now, just return nothing or raise an error.
+  // Let's return an empty group for now.
+  return (draw.group(name: id, {}), tl, tr, br, bl)
+}
+
+/// Draws a resistor
+///
+/// #examples.resistor
+/// For other parameters description, see #doc-ref("element.elmt")
+/// - vertical (bool): Whether the element is vertical or horizontal. If false, port 0 is placed on the west side and port 1 on the east. If true, they are on the north, respectively the south sides
+/// - zigzags (int, none): Number of zigzags for the ANSI style symbol. If `none` (default), a rectangle (IEC style) is drawn.
+#let resistor(
+  x: none,
+  y: none,
+  w: none,
+  h: none,
+  name: none,
+  name-anchor: "center",
+  vertical: false,
+  zigzags: none, // Default to IEC style (rectangle)
+  fill: none,
+  stroke: black + 1pt,
+  id: "",
+  debug: (
+    ports: false
+  )
+) = {
+  let ports = if vertical {(
+    north: ((id: "0"),),
+    south: ((id: "1"),)
+  )} else {(
+    west: ((id: "0"),),
+    east: ((id: "1"),)
+  )}
+
+  element.elmt(
+    draw-shape: draw-shape.with(
+      vertical: vertical,
+      zigzags: zigzags
+    ),
+    x: x,
+    y: y,
+    w: w,
+    h: h,
+    name: name,
+    name-anchor: name-anchor,
+    ports: ports,
+    fill: fill,
+    stroke: stroke,
+    id: id,
+    debug: debug
+  )
+}