Update .gitignore and improve better-auth docs

Added .obsidian/ to .gitignore to exclude Obsidian workspace files. Improved documentation for better-auth integration by correcting the server URL format and reorganizing plugin import statements for clarity.

Author: eastgold15

.gitignore

@@ -174,3 +174,5 @@ dist
 
 **/.vitepress/cache
 **/.vitepress/dist
+
+.obsidian/*

docs/integrations/better-auth.md

@@ -48,7 +48,7 @@ const app = new Elysia()
 	.listen(3000)
 
 console.log(
-    `🦊 Elysia is running at ${app.server?.hostname}:${app.server?.port}`
+    `🦊 Elysia is running at http://${app.server?.hostname}:${app.server?.port}`
 )
 ```
 
@@ -100,13 +100,11 @@ We may do that with the following code:
 
 
 ```ts
+import { openAPI } from 'better-auth/plugins'
 export const auth = betterAuth({
-  plugins: [openAPI()], // [!code ++]
+  plugins: [openAPI()], // [!code ++]
 });
 
-
-import { openAPI } from 'better-auth/plugins'
-
 let _schema: ReturnType<typeof auth.api.generateOpenAPISchema>
 const getSchema = async () => (_schema ??= auth.api.generateOpenAPISchema())