[Glitch] Add eslint-plugin-jsdoc

Port f22b4e556c to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/blurhash.jsx

@@ -20,9 +20,8 @@ import PropTypes from 'prop-types';
 
 /**
  * Component that is used to render blurred of blurhash string
- *
  * @param {BlurhashProps} param1 Props of the component
- * @returns Canvas which will render blurred region element to embed
+ * @returns {JSX.Element} Canvas which will render blurred region element to embed
  */
 function Blurhash({
   hash,