add null transformer

docs/docs/transformers/system/null.mdx

@@ -0,0 +1,37 @@
+---
+title: Null
+id: null-t
+hide_title: true
+slug: /transformers/system/null-t
+---
+
+import { TransformerPageHeader } from '@site/src/CustomComponents/TransformerPageHeader.tsx';
+
+import { DocsTable } from '@site/src/CustomComponents/DocsTable.tsx';
+
+<TransformerPageHeader
+  title="Null"
+  type="string"
+  apiRef="https://github.com/nucleuscloud/neosync/blob/main/worker/internal/benthos/transformers/activities.go"
+/>
+
+## Definition
+
+The null transformer simply returns a null value. This may be useful if you a column that can't be null but don't have a specific value that you want to insert.
+
+## Configurations
+
+There are no configurations for the null transformer.
+
+## Examples
+
+Here are some examples of what an output null value may look like.
+
+<DocsTable
+  headers={['Example Input', 'Example Output']}
+  rowData={[
+    {
+      data: ['N/A', 'null'],
+    },
+  ]}
+/>

docs/docs/transformers/system/sha256hash.mdx

@@ -25,7 +25,7 @@ There are no configurations for the hash transformer.
 
 ## Examples
 
-Here are some examples of what an output state value may look like.
+Here are some examples of what an output hash value may look like.
 
 <DocsTable
   headers={['Example Input', 'Example Output']}

docs/sidebars.js

@@ -181,6 +181,11 @@ const sidebars = {
           id: 'transformers/system/hash',
           label: 'Hash',
         },
+        {
+          type: 'doc',
+          id: 'transformers/system/null-t',
+          label: 'Null Value',
+        },
         {
           type: 'doc',
           id: 'transformers/system/ssn',