Add Swiffy Slider (#43)

* Fix git repo's url

* Fix broken-link-checker instruction

* Add Swiffy slider and carousel

* Add Swiffy slider

* Remove change of formatting

* k

* Update image

* Update title & description

---------

Co-authored-by: Tixie <admin@glitch.family>
Co-authored-by: Tixie <2143796+TixieBorg@users.noreply.github.com>

README.md

@@ -27,7 +27,7 @@ Be sure to read the [Code of Conduct](CODE_OF_CONDUCT.md) and to follow the [con
 ### Check broken links easily
 
 ```
-npx blc https://vanillalist.top -roi
+npx broken-link-checker https://vanillalist.top -roi
 ```
 
 ## License

plugins/swiffy-slider.json

@@ -0,0 +1,9 @@
+{
+    "id": "152",
+    "title": "swiffyslider.js: Light and full-featured slider",
+    "image": "152-swiffyslider.jpg",
+    "description": "Powerfull but also lightweight modern carousel-slider plugin. Easily customizable for all use cases and technical stacks",
+    "url_github": "https://github.com/dynamicweb/swiffy-slider",
+    "url_npm": "https://www.npmjs.com/package/swiffy-slider",
+    "url_demo": "https://swiffyslider.com/examples/"
+}