refactor: Use ESM (#8358)

* wip

* wip

* fix

* clean up

* Update tsconfig.json

* Update activitypub.ts

* wip

packages/backend/src/server/api/openapi/gen-spec.ts

@@ -1,7 +1,7 @@
-import endpoints from '../endpoints';
-import config from '@/config/index';
-import { errors as basicErrors } from './errors';
-import { schemas, convertSchemaToOpenApiSchema } from './schemas';
+import endpoints from '../endpoints.js';
+import config from '@/config/index.js';
+import { errors as basicErrors } from './errors.js';
+import { schemas, convertSchemaToOpenApiSchema } from './schemas.js';
 
 export function genOpenapiSpec(lang = 'ja-JP') {
 	const spec = {

packages/backend/src/server/api/openapi/schemas.ts

@@ -1,4 +1,4 @@
-import { refs, Schema } from '@/misc/schema';
+import { refs, Schema } from '@/misc/schema.js';
 
 export function convertSchemaToOpenApiSchema(schema: Schema) {
 	const res: any = schema;