feat: add templateLimit, outputLengthLimit, and maxDepth DoS limits

Enforce v11 resource guards in render and tags, fix for offset/else behavior, and update tutorials for Tag-class registration.

Co-authored-by: Cursor <[email protected]>

docs/themes/navy/source/js/main.js

@@ -42,8 +42,7 @@
   if (!/\/playground(?:\.html)?$/.test(location.pathname)) return;
   updateVersion(liquidjs.version);
   const engine = new liquidjs.Liquid({
-    memoryLimit: 1e5,
-    renderLimit: 1e5
+    templateLimit: 1e5
   });
   const colorScheme = window.matchMedia('(prefers-color-scheme: dark)');
   const editor = createEditor('editorEl', 'liquid');