themed minirepl

+ add strudelTheme
+ add lineBackground with opacity
+ add some missing light flags
+ add fallback css variables for non js context

packages/react/src/components/style.css

@@ -12,7 +12,3 @@
 .cm-theme-light {
   width: 100%;
 }
-
-.cm-line > * {
-  background: var(--background);
-}