test: Make oclif commands testable (#3571)

* ➕ Add `@oclif/core`

* 📦 Update `package-lock.json`

* 📘 Export `Logger` for use as type

* ✨ Create `BaseCommand`

* 🐛 Prevent DB re-init

* ♻️ Refactor `reset` command

* 🧪 Fix `reset` test

* 👕 Add lint exception

Co-authored-by: Jan Oberhauser <janober@users.noreply.github.com>

packages/cli/src/Db.ts

@@ -45,6 +45,8 @@ export function linkRepository<Entity>(entityClass: EntityTarget<Entity>): Repos
 export async function init(
 	testConnectionOptions?: ConnectionOptions,
 ): Promise<IDatabaseCollections> {
+	if (isInitialized) return collections;
+
 	const dbType = (await GenericHelpers.getConfigValue('database.type')) as DatabaseType;
 	const n8nFolder = UserSettings.getUserN8nFolderPath();