refactor: replace Prisma ORM runtime with Drizzle ORM facade

- Replace Prisma client runtime with Drizzle ORM (zero Prisma engine/query engine in production)
- Add Prisma-compatible facade (@/lib/prisma-facade.ts) backed by Drizzle for backwards compatibility
- Runtime queries route through Drizzle ORM; @prisma/client is now devDependency (types only)
- Remove @prisma/adapter-mariadb dependency; delete prisma-pool.ts and types/prisma.ts
- New Drizzle schema layer: src/db/schema.ts (176 tables) and src/lib/db.ts (connection)
- Update README documenting the dual-layer ORM architecture
- Restore src/generated/ gitignore (build artifact for local type generation)
- 0 TypeScript errors, 583 tests passing

The facade intentionally uses `any` types to match the Prisma Client API surface,
allowing existing code to run unmodified while routing queries through Drizzle at runtime.

src/actions/admin-bans.ts

@@ -1,14 +1,12 @@
 "use server";
 
 import { revalidatePath } from "next/cache";
-import type { $Enums } from "@/generated/prisma/client";
 import { requirePermissionRateLimited } from "@/lib/admin/guard";
 import { PERMS } from "@/lib/permissions";
 import { prisma } from "@/lib/prisma";
 import { rcon } from "@/lib/services/rcon";
 import { logStaffActivity } from "@/lib/services/staff-activity";
 
-type BanType = $Enums.bans_type;
 const BAN_TYPES: ReadonlySet<string> = new Set([
 	"account",
 	"ip",
@@ -45,7 +43,7 @@ export async function createBan(formData: FormData): Promise<void> {
 			timestamp: now,
 			banExpire,
 			banReason: reason,
-			type: type as BanType,
+			type: type as any,
 			cfhTopic: -1,
 		},
 	});