Rename some files and variables (#5587)

* Move composer reducers together

* videoUploadState -> videoState

* Inline videoDispatch

src/view/com/composer/photos/Gallery.tsx

@@ -21,7 +21,7 @@ import {ComposerImage, cropImage} from '#/state/gallery'
 import {Text} from '#/view/com/util/text/Text'
 import {useTheme} from '#/alf'
 import * as Dialog from '#/components/Dialog'
-import {ComposerAction} from '../state'
+import {ComposerAction} from '../state/composer'
 import {EditImageDialog} from './EditImageDialog'
 import {ImageAltTextDialog} from './ImageAltTextDialog'