Feat: docs, code frm percy

packages/html-macro/README.md

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+# html-macro
+
+```rust
+use html_macro::*;
+
+fn main () {
+    let component = html! { <div id='component'>Some component</div> };
+
+    let text_var = "You can interpolate text variables";
+
+    let html = html! {
+       <div onclick=|_ev: web_sys::MouseEvent| {}>
+          You can type text right into the elements
+          { component }
+          { text_var }
+       </div>
+    };
+    println!("{}", node);
+}
+```