docs: update installation.md (#955)

* docs: update installation.md, @sidebase/nuxt-auth should be installed as regular dep

@sidebase/nuxt-auth should be installed as a regular dependency instead of a dev dependency. Also added additional scripts for yarn and pnpm

* revert to dev dep

* Update docs/guide/getting-started/installation.md

* Update docs/guide/getting-started/installation.md

---------

Co-authored-by: Marsel Shaikhin <[email protected]>

Author: s0h311

docs/guide/getting-started/installation.md

@@ -2,10 +2,22 @@
 
 You can install NuxtAuth using nuxi:
 
-```bash
-npx nuxi@latest module add sidebase-auth
+::: code-group
+
+```bash [npm]
+npx nuxi module add sidebase-auth
+```
+
+```bash [pnpm]
+pnpm exec nuxi module add sidebase-auth
 ```
 
+```bash [yarn]
+yarn dlx nuxi module add sidebase-auth
+```
+
+:::
+
 ::: details Manual installation
 
 ::: code-group
@@ -19,7 +31,7 @@ pnpm i -D @sidebase/nuxt-auth
 ```
 
 ```bash [yarn]
-yarn add --dev @sidebase/nuxt-auth
+yarn add -D @sidebase/nuxt-auth
 ```
 
 :::
@@ -31,7 +43,7 @@ Add NuxtAuth to your `nuxt.config`:
 ```ts [nuxt.config.ts]
 export default defineNuxtConfig({
   modules: [
-    '@sidebase/nuxt-auth',
+    '@sidebase/nuxt-auth'
   ],
 })
 ```