site: add anthropic logo to site (#1381)

**Description**

This PR adds the Anthropic logo to the LLM providers section and sorts
all providers alphabetically for better organization.

**Changes:**

- Added Anthropic SVG logo to static assets
- Updated provider list in both README.md and website component
- Implemented alphabetical sorting for the provider list on homepage
- Updated website description to clarify that providers are displayed
alphabetically

**Related Issues/PRs:**

Related PR: #1369

---------

Signed-off-by: Erica Hughberg <[email protected]>

Author: missBerg

README.md

@@ -83,6 +83,12 @@ Envoy AI Gateway supports a wide range of AI providers, making it easy to integr
         <br><sub><b>Tetrate Agent Router Service</b></sub>
       </td>
     </tr>
+    <tr>
+      <td align="center" width="120">
+        <img src="site/static/img/providers/anthropic.svg" width="60" height="60" alt="Anthropic"/>
+        <br><sub><b>Anthropic</b></sub>
+      </td>
+    </tr>
   </table>
 </div>
 

site/src/components/LLMProviders/index.tsx

@@ -84,8 +84,13 @@ const LLMProvidersList: LLMProvider[] = [
     name: 'Tetrate Agent Router Service',
     logoUrl: '/img/providers/tars.svg',
     status: 'supported',
+  },
+  {
+    name: 'Anthropic',
+    logoUrl: '/img/providers/anthropic.svg',
+    status: 'supported',
   }
-];
+].sort((a, b) => a.name.localeCompare(b.name)) as LLMProvider[];
 
 function ProviderLogo({ name, logoUrl, status }: LLMProvider) {
   return (
@@ -122,8 +127,8 @@ export default function LLMProviders(): React.ReactElement {
           </Heading>
           <div className={styles.titleUnderline}></div>
           <p className={styles.sectionDescription}>
-            With the latest version of Envoy AI Gateway you can route traffic to these LLM providers out of the box.
-            For more information and the most up-to-date provider integrations, check out our <a href="/docs/capabilities/llm-integrations/supported-providers" className={styles.docsLink}>
+            With the <code>latest</code> version of Envoy AI Gateway you can route traffic to these LLM providers, displayed alphabetically, out of the box.
+            <br /><br />For more information and the most up-to-date provider integrations, check out our <a href="/docs/capabilities/llm-integrations/supported-providers" className={styles.docsLink}>
             provider documentation</a>.
           </p>
         </div>