Add eslint-plugin-jsdoc (#24719)

.eslintrc.js

app/javascript/mastodon/actions/picture_in_picture.js

app/javascript/mastodon/actions/streaming.js

app/javascript/mastodon/components/blurhash.jsx

app/javascript/mastodon/components/common_counter.jsx

app/javascript/mastodon/components/hashtag.jsx

app/javascript/mastodon/components/short_number.jsx

app/javascript/mastodon/stream.js

app/javascript/mastodon/utils/scrollbar.js

package.json

streaming/index.js

yarn.lock