feat: Initial commit

Sources/CliDoc/Nodes/AnyNode.swift

@@ -0,0 +1,18 @@
+/// A type erased node.
+public struct AnyNode: Node {
+  private var renderNode: () -> String
+
+  public init<N: NodeRepresentable>(_ node: N) {
+    self.renderNode = node.render
+  }
+
+  public var body: some Node {
+    renderNode()
+  }
+}
+
+public extension Node {
+  func eraseToAnyNode() -> AnyNode {
+    .init(self)
+  }
+}