Add information

README.md

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 # Filter-ESEA-League
 Filter teams on the ESEA's ranking webpage, javascript to filter the teams of an specific country and set colors if they are qualified for playoffs
+
+# How to run it
+## Console
+1. On your browser copy the content of the `esea-league-filter-raw.js.
+2. Paste it on your console input.
+3. Run it.
+
+## Bookmark
+1. Copy the content of `esea-league-filter-bookmark.js`
+2. Add a new bookmark on your browser.
+3. Save the bookmark.
+4. Once you are on the division's page, click once the bookmark.
+
+# Screenshots
+![image](https://user-images.githubusercontent.com/11246294/213533813-0680d13b-cb13-4917-bedd-a1c0566c97cf.png)
+![image](https://user-images.githubusercontent.com/11246294/213533970-422af6bd-8d65-486d-bc53-a311fa715189.png)
+![image](https://user-images.githubusercontent.com/11246294/213534061-a42598ee-0654-4f02-89ff-a3631965ff2d.png)