Add basic structure for a collaborative pixel art website

Adds the core project structure, including configuration files, a basic HTML page, and the main application component. It also lays the groundwork for the canvas, color palette, and configuration modal functionalities.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 0385ea33-cde8-4bbd-8fce-8d192d30eb41
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/870d08ce-da3b-4822-9874-c2fe2b7628b1/0385ea33-cde8-4bbd-8fce-8d192d30eb41/Vuy7IOw

drizzle.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from "drizzle-kit";
+
+if (!process.env.DATABASE_URL) {
+  throw new Error("DATABASE_URL, ensure the database is provisioned");
+}
+
+export default defineConfig({
+  out: "./migrations",
+  schema: "./shared/schema.ts",
+  dialect: "postgresql",
+  dbCredentials: {
+    url: process.env.DATABASE_URL,
+  },
+});