fix(repository): Move backend code into subdirectory

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

backend/src/errors/errors.ts

@@ -0,0 +1,61 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class NotInDBError extends Error {
+  name = 'NotInDBError';
+}
+
+export class AlreadyInDBError extends Error {
+  name = 'AlreadyInDBError';
+}
+
+export class ForbiddenIdError extends Error {
+  name = 'ForbiddenIdError';
+}
+
+export class ClientError extends Error {
+  name = 'ClientError';
+}
+
+export class PermissionError extends Error {
+  name = 'PermissionError';
+}
+
+export class TokenNotValidError extends Error {
+  name = 'TokenNotValidError';
+}
+
+export class TooManyTokensError extends Error {
+  name = 'TooManyTokensError';
+}
+
+export class PermissionsUpdateInconsistentError extends Error {
+  name = 'PermissionsUpdateInconsistentError';
+}
+
+export class MediaBackendError extends Error {
+  name = 'MediaBackendError';
+}
+
+export class PrimaryAliasDeletionForbiddenError extends Error {
+  name = 'PrimaryAliasDeletionForbiddenError';
+}
+
+export class InvalidCredentialsError extends Error {
+  name = 'InvalidCredentialsError';
+}
+
+export class NoLocalIdentityError extends Error {
+  name = 'NoLocalIdentityError';
+}
+
+export class PasswordTooWeakError extends Error {
+  name = 'PasswordTooWeakError';
+}
+
+export class MaximumDocumentLengthExceededError extends Error {
+  name = 'MaximumDocumentLengthExceededError';
+}