added docs

Author: Michael Myaskovsky

docs/_snippets/cloud/integrations/clickhouse.mdx

@@ -0,0 +1,15 @@
+You will connect Elementary Cloud to Clickhouse for syncing the Elementary schema (created by the [Elementary dbt package](/cloud/onboarding/quickstart-dbt-package)).
+
+<Snippet file="cloud/integrations/create-user-operation.mdx" />
+
+### Fill the connection form
+
+Provide the following fields:
+
+- **Host**: The hostname of your Clickhouse account to connect to. This can either be a hostname or an IP address.
+- **Port**: The port of your Clickhouse account to connect to.
+- **Elementary schema**: The name of your Elementary schema. Usually `[schema name]_elementary`.
+- **User**: The name of the for Elementary user.
+- **Password**: The password associated with the provided user.
+
+<Snippet file="cloud/integrations/ip-allowlist.mdx" />

docs/_snippets/oss/adapters-cards.mdx

@@ -245,6 +245,19 @@
         <path d="m84 26.19-4.39-2.19v36.69l4.39-.8z" fill="#f58534" />
       </svg>
     }
+  ></Card>
+    <Card
+    title="dbt-clickhouse"
+    icon={
+      <svg
+        height="40"
+        viewBox="15 15 100 100"
+        width="40"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+      <path d="m0 7h1v1h-1z" fill="#f00"/><path d="m0 0h1v7h-1zm2 0h1v8h-1zm2 0h1v8h-1zm2 0h1v8h-1zm2 3.25h1v1.5h-1z" fill="#fc0"/>
+      </svg>
+    }
   ></Card>
   <Card
     title="dbt-trino"