feat(extentions/code): move styles into separate file

should fix https://github.com/logseq/logseq/issues/528

src/main/frontend/extensions/code.cljs

@@ -137,10 +137,8 @@
                  (when-let [pos-meta (::pos-meta state)]
                    (reset! pos-meta (last (:rum/args state)))))}
   [state config id attr code pos_meta]
-  [:div.relative
-   [:div.absolute.top-0.right-0.p-1.text-sm.text-gray-500
-    {:style {:z-index 2
-             :background "white"}}
+  [:div.extensions__code
+   [:div.extensions__code-lang
     (let [mode (get attr :data-lang "javascript")]
       (if (= mode "text/x-clojure")
         "clojure"

src/main/frontend/extensions/code.css

@@ -0,0 +1,9 @@
+.extensions__code {
+    @apply relative
+}
+
+.extensions__code-lang {
+    @apply absolute top-0 right-0 p-1 text-sm text-gray-500;
+    z-index: 2;
+    background: white;
+}