feat: add row/col tags

test_cml/code.cml

@@ -0,0 +1 @@
+<bundle src="/app.bundle" />

test_cml/header.cml

@@ -0,0 +1,9 @@
+<meta>
+  <fragment>
+    <name>header</header>
+	<attr type="string" name="content" />
+  </fragment>
+</meta>
+
+<text level="1" style="bold italic">{content}</text>
+

test_cml/hello.cml

@@ -1,4 +1,16 @@
+<import src="https://google.com/header.cml" />
+
 <box>
   <text level="1">hello from clef</text>
   <text>this is rendered from hello.cml</text>
 </box>
+
+<header content="my content" />
+
+<row id="kasjksajdkj">
+  <text level="1">hello from clef</text>
+  <text>this is rendered from hello.cml</text>
+</row>
+
+<bundle src="/app.bundle" />
+

test_cml/permission.cml

@@ -0,0 +1,17 @@
+<meta>
+  <title>asdklasdk</title>
+  <description>askdjksajdk</description>
+
+  <!-- permission system -->
+  <permissions>
+    <filesystem description="aksdjsadjksjdk" />
+	<camera description="asldklsadk" />
+	<location description="" type="precise|approximate" />
+	<gpu />
+  </permissions>
+</meta>
+
+<text id="label" />
+
+<bundle src="./app.wasm" />
+

test_cml/test.cml

@@ -0,0 +1,4 @@
+<col>
+  <text>hello from clef</text>
+  <text>this is rendered from test.cml</text>
+</col>