feat: update font file and add meta tags (#400)

* fix: add new, smaller FG_Virgil file

* fix: update with new codesandbox font file link

* feat: add og-image and meta tags

* feat: add pr template

* fix: update pr template

* fix: remove pr template

* refactor: remove twitter meta in favor of og:image

* fix: add og:image:width

* refactor: update image

* refactor: use image in readme

README.md

@@ -1,6 +1,6 @@
 <div align="center" style="display:flex;flex-direction:column;">
     <a href="https://excalidraw.com">
-        <img src=".github/assets/logo.png" alt="" width="220px" height="202"/>
+        <img src="./public/og-image.png" alt="Excalidraw logo: Sketch handrawn like diagrams." />
     </a>
     <h3>Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.</h3>
 </div>