First commit

Create basic render engine that only allows to add elements

src/lib/YarJs.interfaces.ts

@@ -0,0 +1,18 @@
+export type YarHTMLTagName = keyof React.JSX.IntrinsicElements | string;
+
+export type YarProps = {
+  children: YarElement[];
+  [key: string]: unknown;
+};
+
+export interface YarElement {
+  type: YarHTMLTagName;
+  props: YarProps;
+}
+
+export interface YarFiber extends YarElement {
+  parent: null | YarFiber;
+  dom: null | HTMLElement | Text;
+  child: null | YarFiber;
+  sibling: null | YarFiber;
+}