✨ Add Firebase node (#1173)

* ⚡ Added node for Google firebase Firestore database

* ⚡ added firebase's realtime database node

* Added operation to run queries on documents collection

* Improvements to Firebase Database nodes
- Realtime Database: improved how the node interacts with input database
- Cloud Firestore: improved how the node interacts with input database
- Cloud Firestore: improved input / output format so it's similar to JSON and more intuitive, abstracting Firestore's format

* ⚡ Improvements to Firestore-Node

* ⚡ improvements to Firebase-Node

* ⚡ Improvements

⚡ Improvements

* ⚡ Improvements

* ⚡ Minor improvements to Firebase Nodes

Co-authored-by: Omar Ajoue <krynble@gmail.com>
Co-authored-by: ricardo <ricardoespinoza105@gmail.com>

packages/nodes-base/credentials/GoogleFirebaseCloudFirestoreOAuth2Api.credentials.ts

@@ -0,0 +1,26 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+const scopes = [
+	'https://www.googleapis.com/auth/datastore',
+	'https://www.googleapis.com/auth/firebase',
+];
+
+export class GoogleFirebaseCloudFirestoreOAuth2Api implements ICredentialType {
+	name = 'googleFirebaseCloudFirestoreOAuth2Api';
+	extends = [
+		'googleOAuth2Api',
+	];
+	displayName = 'Google Firebase Cloud Firestore OAuth2 API';
+	documentationUrl = 'google';
+	properties = [
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden' as NodePropertyTypes,
+			default: scopes.join(' '),
+		},
+	];
+}