Add basic prettier support for doc tag

packages/prettier-plugin-liquid/src/printer/printer-liquid-html.ts

@@ -242,6 +242,15 @@ function printNode(
           ? join(hardline, reindent(lines, shouldSkipFirstLine))
           : softline;
 
+      if (parentNode && parentNode.name === 'doc') {
+        // here we know that we are in a liquidDocNode
+        // Is it better to implement this here or in LiquidRawTag?
+        // One of the benefits of leaving it here is that we can use the indentation and other logic from the raw markup.
+        // The benefit of doing it in LiquidRawTag is that we can keep the logic for doc separate
+        // I still want to understand how embeddings would work in this scenario. Maybe that's a complete different approach that we could take.
+        return [indent([hardline, body]), hardline];
+      }
+
       if (shouldIndentBody) {
         return [indent([hardline, body]), hardline];
       } else {
@@ -547,6 +556,10 @@ function printNode(
       return [...doc, ...lookups];
     }
 
+    case NodeTypes.LiquidDocParamNode: {
+      return [node.name, 'asdf123', path.call((p: any) => print(p), 'value')];
+    }
+
     default: {
       return assertNever(node);
     }

packages/prettier-plugin-liquid/src/test/liquid-doc/fixed.liquid

@@ -0,0 +1,9 @@
+It should indent the body
+{% doc %}
+  @param body
+{% enddoc %}
+
+It should not dedent to root
+{% doc %}
+  @param body
+{% enddoc %}

packages/prettier-plugin-liquid/src/test/liquid-doc/index.liquid

@@ -0,0 +1,9 @@
+It should indent the body
+{% doc %}
+@param body
+{% enddoc %}
+
+It should not dedent to root
+{% doc %}
+    @param body
+{% enddoc %}

packages/prettier-plugin-liquid/src/test/liquid-doc/index.spec.ts

@@ -0,0 +1,7 @@
+import { test } from 'vitest';
+import { assertFormattedEqualsFixed } from '../test-helpers';
+import * as path from 'path';
+
+test('Unit: liquid-doc', async () => {
+  await assertFormattedEqualsFixed(__dirname);
+});