Add application codebase: PDF annotation for e-Court

Next.js 14 + Drizzle/PostgreSQL + SSE realtime sync — highlight,
freehand, comment, bookmark + ฟีเจอร์ต่อยอด F1–F19 (edit/move, undo/redo,
shapes, redaction, export PDF/CSV, reply, resolve, search, summary,
textbox, stamp, version history)

Co-Authored-By: Claude Code <noreply@anthropic.com>

drizzle.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from "drizzle-kit";
+
+export default defineConfig({
+  schema: "./db/schema.ts",
+  out: "./drizzle",
+  dialect: "postgresql",
+  dbCredentials: {
+    url: process.env.DATABASE_URL!,
+  },
+});
+