add Fireworks LLM (FlowiseAI#2597)

* add Fireworks LLM

* support multiple models

* Update Fireworks.ts

* fix linting

---------

Co-authored-by: Henry Heng <henryheng@flowiseai.com>

packages/components/nodes/llms/Fireworks/Fireworks.ts

@@ -0,0 +1,68 @@
+import { getBaseClasses, getCredentialData, getCredentialParam, ICommonObject, INode, INodeData, INodeParams } from '../../../src'
+import { Fireworks } from '@langchain/community/llms/fireworks'
+import { BaseCache } from '@langchain/core/caches'
+
+class Fireworks_LLMs implements INode {
+    label: string
+    name: string
+    version: number
+    type: string
+    icon: string
+    category: string
+    description: string
+    baseClasses: string[]
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Fireworks'
+        this.name = 'fireworks'
+        this.version = 1.0
+        this.type = 'Fireworks'
+        this.icon = 'fireworks.png'
+        this.category = 'LLMs'
+        this.description = 'Wrapper around Fireworks API for large language models'
+        this.baseClasses = [this.type, ...getBaseClasses(Fireworks)]
+        this.credential = {
+            label: 'Connect Credential',
+            name: 'credential',
+            type: 'credential',
+            credentialNames: ['fireworksApi']
+        }
+        this.inputs = [
+            {
+                label: 'Cache',
+                name: 'cache',
+                type: 'BaseCache',
+                optional: true
+            },
+            {
+                label: 'Model Name',
+                name: 'modelName',
+                type: 'string',
+                default: 'accounts/fireworks/models/llama-v3-70b-instruct-hf',
+                description: 'For more details see https://fireworks.ai/models',
+                optional: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
+        const cache = nodeData.inputs?.cache as BaseCache
+        const modelName = nodeData.inputs?.modelName as string
+
+        const credentialData = await getCredentialData(nodeData.credential ?? '', options)
+        const fireworksKey = getCredentialParam('fireworksApiKey', credentialData, nodeData)
+
+        const obj: any = {
+            fireworksApiKey: fireworksKey,
+            modelName: modelName
+        }
+        if (cache) obj.cache = cache
+
+        const fireworks = new Fireworks(obj)
+        return fireworks
+    }
+}
+
+module.exports = { nodeClass: Fireworks_LLMs }