add excalidraw_embed into base repo (#2040)

Co-authored-by: Lipis <lipiridis@gmail.com>

public/app.css

@@ -1,29 +0,0 @@
-.visually-hidden {
-  position: absolute !important;
-  height: 1px;
-  width: 1px;
-  overflow: hidden;
-  clip: rect(1px, 1px, 1px, 1px);
-  white-space: nowrap; /* added line */
-}
-
-.LoadingMessage {
-  position: absolute;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  z-index: 999;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  pointer-events: none;
-}
-
-.LoadingMessage span {
-  background-color: var(--button-gray-1);
-  border-radius: 5px;
-  padding: 0.8em 1.2em;
-  color: var(--popup-text-color);
-  font-size: 1.3em;
-}

public/fonts.css

@@ -1,13 +0,0 @@
-/* http://www.eaglefonts.com/fg-virgil-ttf-131249.htm */
-@font-face {
-  font-family: "Virgil";
-  src: url("FG_Virgil.woff2");
-  font-display: swap;
-}
-
-/* https://github.com/microsoft/cascadia-code */
-@font-face {
-  font-family: "Cascadia";
-  src: url("Cascadia.woff2");
-  font-display: swap;
-}

public/index.html

@@ -60,8 +60,6 @@
     <!-- OG tags require absolute url for images -->
     <meta name="twitter:image" content="https://excalidraw.com/og-image.png" />
     <link rel="shortcut icon" href="favicon.ico" type="image/x-icon" />
-    <link rel="stylesheet" href="fonts.css" type="text/css" />
-    <link rel="stylesheet" href="app.css" type="text/css" />
 
     <link
       rel="preload"