feature/add-perplexity-node (#4376)

* added perplexity node

* last stable release

* Update ChatPerplexity.ts

* update

* Update ChatPerplexity.ts

* Update ChatPerplexity.ts

* pnpm lint fix

* feat: update @langchain/community from 0.3.24 to 0.3.29

---------

Co-authored-by: Marvin <marvin.chin@regentmarkets.com>

packages/components/credentials/PerplexityApi.credential.ts

@@ -0,0 +1,27 @@
+import { INodeParams, INodeCredential } from '../src/Interface'
+
+class PerplexityApi implements INodeCredential {
+    label: string
+    name: string
+    version: number
+    description: string
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Perplexity API'
+        this.name = 'perplexityApi'
+        this.version = 1.0
+        this.description =
+            'Refer to <a target="_blank" href="https://docs.perplexity.ai/docs/getting-started">official guide</a> on how to get API key'
+        this.inputs = [
+            {
+                label: 'Perplexity API Key',
+                name: 'perplexityApiKey',
+                type: 'password',
+                placeholder: '<PERPLEXITY_API_KEY>'
+            }
+        ]
+    }
+}
+
+module.exports = { credClass: PerplexityApi }