refactor(editor): update yt delete button

src/components/Markdown/YoutubeDirectiveDescriptor.tsx

@@ -26,6 +26,8 @@ export const YoutubeDirectiveDescriptor: DirectiveDescriptor<YoutubeDirectiveNod
         >
           <button
             type='button'
+            title='delete'
+            className='btnMain'
             onClick={() => {
               parentEditor.update(() => {
                 lexicalNode.selectNext()
@@ -33,7 +35,15 @@ export const YoutubeDirectiveDescriptor: DirectiveDescriptor<YoutubeDirectiveNod
               })
             }}
           >
-            delete
+            <svg
+              xmlns='http://www.w3.org/2000/svg'
+              viewBox='0 0 448 512'
+              width='1em'
+              height='1em'
+              fill='currentColor'
+            >
+              <path d='M135.2 17.7L128 32 32 32C14.3 32 0 46.3 0 64S14.3 96 32 96l384 0c17.7 0 32-14.3 32-32s-14.3-32-32-32l-96 0-7.2-14.3C307.4 6.8 296.3 0 284.2 0L163.8 0c-12.1 0-23.2 6.8-28.6 17.7zM416 128L32 128 53.2 467c1.6 25.3 22.6 45 47.9 45l245.8 0c25.3 0 46.3-19.7 47.9-45L416 128z' />
+            </svg>
           </button>
           <iframe
             width='560'