chore: revert changes to other docs

Author: danielroe

Diff for: README.md

@@ -90,8 +90,7 @@ You can follow the progress and future plans on [the Roadmap issue](https://gith
 VueFire requires the `firebase` package to be installed as well as `vuefire`:
 
 ```bash
-npm install firebase
-npx nuxi@latest module add vuefire
+npm install vuefire firebase
 ```
 
 Check [the documentation](https://vuefire.vuejs.org/nuxt/getting-started.html) for Nuxt instructions.

Diff for: docs/guide/getting-started.md

@@ -5,11 +5,23 @@ Before using VueFire, make sure you have a Firebase account and a project setup
 ## Installation
 
 In order to get started make sure to install the latest version of `vuefire` as well as `firebase`:
-```bash
-npm i firebase
-npx nuxi@latest module add vuefire
+
+::: code-group
+
+```sh [pnpm]
+pnpm i vuefire firebase
+```
+
+```sh [yarn]
+yarn add vuefire firebase
 ```
 
+```sh [npm]
+npm i vuefire firebase
+```
+
+:::
+
 ::: warning
 
 VueFire requires Firebase JS SDK >= 9 but **is compatible with Vue 2 and Vue 3**.