Add pnpm back to CLI docs (#939)

* add code group with pnpm back

* add pnpm add commands

---------

Co-authored-by: Ethan Palm <[email protected]>

Author: lawreka

installation.mdx

@@ -24,10 +24,16 @@ icon: "terminal"
   <Step title="Install the CLI.">
     Run the following command to install the [CLI](https://www.npmjs.com/package/mint):
 
-    ```bash
+  <CodeGroup>
+    ```bash npm
     npm i -g mint
     ```
 
+    ```bash pnpm
+    pnpm add -g mint
+    ```
+  </CodeGroup>
+
   </Step>
   <Step title="Preview locally.">
     Navigate to your docs directory (where your `docs.json` file is located) and execute the following command:
@@ -56,9 +62,15 @@ mint update
 
 If this `mint update` command is not available on your local version, re-install the CLI with the latest version:
 
-```bash
-npm i -g mint@latest
-```
+ <CodeGroup>
+    ```bash npm
+    npm i -g mint@latest
+    ```
+
+    ```bash pnpm
+    pnpm add -g mint@latest
+    ```
+  </CodeGroup>
 
 ## Custom ports
 
@@ -137,6 +149,8 @@ If you use JetBrains, we recommend the [MDX IntelliJ IDEA plugin](https://plugin
   </Accordion>
   <Accordion title="mintlify vs. mint package">
     If you have any problems with the CLI package, you should first run `npm ls -g`. This command shows what packages are globally installed on your machine.
+
+    If you don't use npm or don't see it in the -g list, try `which mint` to locate the installation.
 
     If you have a package named `mint` and a package named `mintlify` installed, you should uninstall `mintlify`.
 
@@ -150,7 +164,7 @@ If you use JetBrains, we recommend the [MDX IntelliJ IDEA plugin](https://plugin
     ```
     3. Reinstall the new package:
     ```bash
-      npm install -g mint
+    npm i -g mint
     ```
   </Accordion>
 </AccordionGroup>

quickstart.mdx

@@ -82,9 +82,15 @@ The code-based workflow integrates with your existing development environment an
 
 To work locally with your documentation, install the Command Line Interface (CLI), called [mint](https://www.npmjs.com/package/mint), by running this command in your terminal:
 
-```bash
-npm i -g mint
-```
+<CodeGroup>
+  ```bash npm
+  npm i -g mint
+  ```
+
+  ```bash pnpm
+  pnpm add -g mint
+  ```
+</CodeGroup>
 
 <Info>
   You need Node.js installed on your machine. If you encounter installation issues, check the troubleshooting guide.