feat: integrate Slack notifications for contact form submissions

- Added a new Slack notification feature to alert sales or support channels upon contact form submissions.
- Implemented a `notifySlack` function to format and send messages to Slack using a webhook.
- Enhanced error handling to ensure email notifications proceed even if Slack notifications fail.

apps/website/app/api/contact/route.ts

@@ -1,4 +1,5 @@
 import { getHubSpotUTK, submitToHubSpot } from "@/lib/hubspot";
+import { notifySlack } from "@/lib/slack";
 import type { NextRequest } from "next/server";
 import { NextResponse } from "next/server";
 import { Resend } from "resend";
@@ -70,6 +71,23 @@ export async function POST(request: NextRequest) {
 			}
 		}
 
+		// Send notification to Slack (sales or support channel)
+		try {
+			const slackSuccess = await notifySlack(body);
+			if (slackSuccess) {
+				console.log(
+					`Successfully sent ${body.inquiryType} inquiry notification to Slack`,
+				);
+			} else {
+				console.warn(
+					`Failed to send ${body.inquiryType} inquiry notification to Slack, but continuing with email`,
+				);
+			}
+		} catch (error) {
+			console.error("Error sending to Slack:", error);
+			// Continue with email even if Slack fails
+		}
+
 		// Format email content
 		const emailSubject = `[${body.inquiryType.toUpperCase()}] New contact form submission from ${body.firstName} ${body.lastName}`;
 		const emailBody = `