delete media-plugins and -interfaces

src/components/editor/plugins/editor-plugins.tsx

src/components/editor/plugins/media-plugins.tsx

src/components/editor/use-create-editor.ts

src/components/plate-ui/export-toolbar-button.tsx

src/components/plate-ui/fixed-toolbar-buttons.tsx

src/components/plate-ui/image-element-static.tsx

src/components/plate-ui/image-element.tsx

src/components/plate-ui/media-audio-element-static.tsx

src/components/plate-ui/media-audio-element.tsx

src/components/plate-ui/media-embed-element.tsx

src/components/plate-ui/media-file-element-static.tsx

src/components/plate-ui/media-file-element.tsx

src/components/plate-ui/media-placeholder-element.tsx

src/components/plate-ui/media-popover.tsx

src/components/plate-ui/media-toolbar-button.tsx

src/components/plate-ui/media-upload-toast.tsx

src/components/plate-ui/media-video-element-static.tsx

src/components/plate-ui/media-video-element.tsx