Migrate to storybook v9

Author: inokawa

.storybook/main.js

@@ -1,7 +1,7 @@
 /** @type { import('@storybook/react-vite').StorybookConfig } */
 export default {
   stories: ["../stories/**/*.mdx", "../stories/**/*.stories.@(js|jsx|ts|tsx)"],
-  addons: ["@storybook/addon-storysource"],
+  addons: ["@storybook/addon-docs"],
   staticDirs: [
     // for kuromojin
     {

.storybook/manager.js

@@ -1,11 +1,16 @@
-/** @type { import('@storybook/react').Preview } */
+/** @type { import('@storybook/react-vite').Preview } */
 export default {
   parameters: {
     actions: { argTypesRegex: "^on[A-Z].*" },
+
     options: {
       storySort: {
         order: ["basics", ["Textarea", "Input"]],
       },
     },
+
+    docs: {
+      codePanel: true
+    }
   },
 };