feat: Moves core functionality into it's own library.

Sources/CliDocCore/Utils.swift

@@ -0,0 +1,36 @@
+@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
+}
+
+extension Array where Element == (any TextNode) {
+
+  @usableFromInline
+  func removingEmptys() -> [String] {
+    compactMap { node in
+      let string = node.render()
+      if string == "" {
+        return nil
+      }
+      return string
+    }
+  }
+
+}