feat(01-01): configure Drizzle schema with entries table

- Schema with unified entries table (task/thought types)
- Fields: id, title, content, type, status, pinned, dueDate, timestamps
- Database connection with WAL mode
- Drizzle kit scripts (db:generate, db:migrate, db:push, db:studio)
- Database file at ./data/taskplaner.db

package.json

@@ -9,7 +9,11 @@
 		"preview": "vite preview",
 		"prepare": "svelte-kit sync || echo ''",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"db:generate": "drizzle-kit generate",
+		"db:migrate": "drizzle-kit migrate",
+		"db:push": "drizzle-kit push",
+		"db:studio": "drizzle-kit studio"
 	},
 	"devDependencies": {
 		"@sveltejs/adapter-auto": "^7.0.0",