Ensure type imports and exports are explicit (#1009)

Required as @tsconfig/ember has added "verbatimModuleSyntax": true,

tsconfig/bases@aacda43

Labelled as enhancement because I'm not sure how this affects the public QueueName type export

Ref: failing build #1008

ember-file-upload/src/index.ts

@@ -16,7 +16,7 @@ export {
   FileSource,
   FileState,
   // Interfaces
-  QueueName,
+  type QueueName,
   // Constants
   DEFAULT_QUEUE,
 };

ember-file-upload/src/services/file-queue.ts

@@ -3,7 +3,7 @@ import Service from '@ember/service';
 import { registerDestructor } from '@ember/destroyable';
 import { Queue } from '../queue.ts';
 import type { UploadFile } from '../upload-file.ts';
-import { QueueName } from '../interfaces.ts';
+import type { QueueName } from '../interfaces.ts';
 import { TrackedMap } from 'tracked-built-ins';
 
 export const DEFAULT_QUEUE = Symbol('DEFAULT_QUEUE');

ember-file-upload/src/system/data-transfer-wrapper.ts

@@ -1,4 +1,4 @@
-import { FileUploadDragEvent } from '../interfaces.ts';
+import type { FileUploadDragEvent } from '../interfaces.ts';
 
 const getDataSupport = {};
 

ember-file-upload/src/system/drag-listener-modifier.ts

@@ -1,5 +1,5 @@
-import Modifier, { ArgsFor, NamedArgs } from 'ember-modifier';
-import { DragListenerModifierSignature } from '../interfaces.ts';
+import Modifier, { type ArgsFor, type NamedArgs } from 'ember-modifier';
+import type { DragListenerModifierSignature } from '../interfaces.ts';
 import DragListener from './drag-listener.ts';
 import { registerDestructor } from '@ember/destroyable';
 import type Owner from '@ember/owner';

ember-file-upload/src/system/http-request.ts

@@ -1,6 +1,6 @@
 import { bind } from '@ember/runloop';
 import RSVP from 'rsvp';
-import { HTTPRequestOptions } from '../interfaces.ts';
+import type { HTTPRequestOptions } from '../interfaces.ts';
 
 function parseHeaders(headerString: string) {
   return headerString

ember-file-upload/src/system/upload.ts

@@ -3,7 +3,7 @@ import HTTPRequest from './http-request.ts';
 import RSVP from 'rsvp';
 import { waitForPromise } from '@ember/test-waiters';
 import type { UploadFile } from '../upload-file.ts';
-import { FileState, UploadOptions } from '../interfaces.ts';
+import { FileState, type UploadOptions } from '../interfaces.ts';
 
 function clone(object: object | undefined) {
   return object ? { ...object } : {};

ember-file-upload/src/upload-file.ts

@@ -7,7 +7,7 @@ import UploadFileReader from './system/upload-file-reader.ts';
 import type { Queue } from './queue.ts';
 import { guidFor } from '@ember/object/internals';
 import RSVP from 'rsvp';
-import { FileSource, FileState, UploadOptions } from './interfaces.ts';
+import { FileSource, FileState, type UploadOptions } from './interfaces.ts';
 
 /**
  * Files provide a uniform interface for interacting