feat: initialize booster role bot with database and Discord integration

- Add drizzle configuration for SQLite database
- Create package.json with necessary dependencies and scripts
- Implement configuration loading for Discord bot
- Define permissions for roles
- Set up database schema for booster roles
- Create Discord client and commands for managing booster roles
- Handle guild member updates to manage roles based on boost status
- Implement boost eligibility checks and role management logic
- Add tests for boost eligibility and role guards
- Create service for managing booster roles with in-memory storage for testing
- Configure TypeScript settings for the project

src/domain/boostEligibility.ts

@@ -0,0 +1,13 @@
+export type BoostEligibilityInput = {
+  verifiedBoostCount: number | null;
+};
+
+export function assertBoostEligibility(input: BoostEligibilityInput): void {
+  if (input.verifiedBoostCount === null) {
+    throw new Error("Boost eligibility cannot be verified");
+  }
+
+  if (input.verifiedBoostCount < 2) {
+    throw new Error("User must have at least two server boosts to claim a custom role");
+  }
+}