Fluent: update source code structure (#5144)

* WIP

* Remove redundant babel config

* Remove unrelated changes

Author: OEvgeny

packages/fluent-theme/babel.config.json

@@ -3,9 +3,9 @@ import cx from 'classnames';
 import React, { memo, useCallback, useEffect, useRef, useState, type DragEventHandler } from 'react';
 import { useRefFrom } from 'use-ref-from';
 
-import { AddDocumentIcon } from '../../icons/AddDocumentIcon';
+import { AddDocumentIcon } from '../../icons';
 import testIds from '../../testIds';
-import styles from './index.module.css';
+import styles from './DropZone.module.css';
 import { useStyles } from '../../styles';
 
 const { useLocalizer } = hooks;

packages/fluent-theme/src/components/DropZone.tsx

@@ -0,0 +1 @@
+export { default as DropZone } from './DropZone';

packages/fluent-theme/src/components/SendBox.tsx

@@ -1,7 +1,7 @@
 import { hooks } from 'botframework-webchat-component';
 import React, { useCallback, useRef, type ChangeEventHandler, memo } from 'react';
 import { useRefFrom } from 'use-ref-from';
-import { AttachmentIcon } from '../../icons/AttachmentIcon';
+import { AttachmentIcon } from '../../icons';
 import testIds from '../../testIds';
 import { ToolbarButton } from './Toolbar';
 import styles from './AddAttachmentButton.module.css';