FAQ: Added command line usage instructions (#800)

Author: Josh65-2201

src/routes/docs/getting-started/faq/+page.md

@@ -39,3 +39,12 @@ The default settings are designed to deliver the best performance across differe
 Resource consumption naturally increases when opening new tabs or navigating to different locations. However, we're aware of several memory leaks that can cause usage to accumulate over extended sessions.
 
 To mitigate this, consider disabling the option to keep Files in the background from **Settings → Advanced → Leave app running in the background when the window is closed**. Note that turning this off may result in slower launch times for Files. We're investigating these leaks and looking for a long-term solution.
+
+## How to Open Files from Command Line
+
+To open Files from command line, run the following command: `files-<branch>.exe`, replacing `<branch>` with the version of Files you have installed:
+- `stable`: Production build
+- `preview`: Beta/preview build
+- `dev`: Development build
+
+You can also use the path parameter to open a folder inside of Files, for example: `files-stable.exe "C:\Users\YourName\Documents"`.