bundle all fonts

Should fix #57

lib/widgets/html/code_block.dart

@@ -25,7 +25,7 @@ class const CodeBlock(
                     padding: .symmetric(horizontal: 8),
                     child: Text(
                       lang.substring(0, min(lang.length, 15)),
-                      style: .new(fontFamily: "monospace"),
+                      style: .new(fontFamily: "bundled-mono"),
                     ),
                   ),
                   TextButton.icon(
@@ -44,7 +44,7 @@ class const CodeBlock(
                     code,
                     minLines: 1,
                     maxLines: 99,
-                    style: .new(fontFamily: "monospace"),
+                    style: .new(fontFamily: "bundled-mono"),
                   ),
                 ),
               ),

lib/widgets/html/html.dart

@@ -51,7 +51,19 @@ class const Html(
                     element.text,
                     lang: element.className.replaceAll("language-", ""),
                   )
-                : null,
+                : ClipRRect(
+                    borderRadius: .all(.circular(4)),
+                    child: Container(
+                      padding: .all(8),
+                      color: Theme.of(context)
+                          .colorScheme
+                          .surfaceContainerHighest,
+                      child: SelectableText(
+                        element.text,
+                        style: .new(fontFamily: "bundled-mono"),
+                      ),
+                    ),
+                  ),
 
           "blockquote" => Quoted(
             Html(element.innerHtml, textStyle: textStyle, roomId: roomId),