feat: Adds stacks, working on styles

Sources/CliDoc/Utils.swift

@@ -0,0 +1,21 @@
+@usableFromInline
+func array(from node: any TextNode) -> [any TextNode] {
+  if let container = node as? NodeContainer {
+    return container.nodes
+  } else if let array = node as? [any TextNode] {
+    return array
+  } else {
+    return [node]
+  }
+}
+
+@usableFromInline
+func seperator(_ separator: String, count: Int) -> any TextNode {
+  assert(count >= 0, "Invalid count while creating a separator")
+
+  var output = ""
+  for _ in 0 ... count {
+    output += separator
+  }
+  return output
+}