[bridge-doc] make bridge runbook more visible (#19746)

## Description 

as title

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

docs/content/guides.mdx

@@ -55,4 +55,6 @@ Learn how to operate a Full node on Sui.
 <Card title="Full node data management" href="/guides/operator/data-management">
 Optimize your Full node configuration for efficient node operation.
 </Card>
+<Card title="Sui Bridge Node configuration" href="/guides/operator/bridge-node-configuration">
+</Card>
 </Cards>

docs/content/guides/operator.mdx

@@ -30,4 +30,9 @@ Guides that benefit both Full node operators and validators include:
 
 ## Exchange integration guide
 
-The [Sui Exchange Integration Guide](./operator/exchange-integration.mdx) provides step-by-step instructions on how to integrate SUI into a cryptocurrency exchange.
+The [Sui Exchange Integration Guide](./operator/exchange-integration.mdx) provides step-by-step instructions on how to integrate SUI into a cryptocurrency exchange.
+
+## Sui Bridge Node validators
+
+Guides that inform validators how to operate Sui Bridge include:
+- [Sui Bridge Node Configuration](./operator/bridge-node-configuration.mdx)

docs/site/src/pages/index.js

@@ -70,6 +70,12 @@ export default function Home() {
               Run a Sui Full node
               <span className="block bg-auto bg-[url(../static/img/index/right-arrow.svg)]"></span>
             </Link>
+            <Link
+              className={styles.cardLink}
+              to="./guides/operator/bridge-node-configuration"
+            >
+              Sui Bridge Node configuration
+            </Link>
           </HomeCard>
           <HomeCard title="About Sui">
             <Link className={styles.cardLink} to="./concepts/tokenomics">