docs(en): write introduction and getting-started pages

docs/en-US/index.md

@@ -1,3 +1,28 @@
 # termscp
 
-Placeholder.
+![termscp explorer](https://github.com/veeso/termscp/blob/main/assets/images/explorer.gif?raw=true)
+
+termscp is a feature-rich terminal file transfer client and explorer with a
+TUI (Terminal User Interface). It lets you connect to a remote server to
+upload and download files while interacting with your local file system at the
+same time. termscp runs on Linux, macOS, FreeBSD, NetBSD, and Windows.
+
+## Features
+
+- Multiple transfer protocols: SFTP, SCP, FTP and FTPS, Kube, S3, SMB,
+  and WebDAV.
+- Dual-pane explorer to browse and operate on both the remote and the local
+  file system: create, remove, rename, search, view, and edit files.
+- Bookmarks and recent connections to quickly reconnect to your favorite
+  hosts.
+- View and edit files with your favorite editor.
+- SFTP/SCP authentication with SSH keys or username and password.
+- Embedded terminal for running commands on your system.
+- Make it yours: themes, custom file explorer format, customizable text
+  editor, and customizable file sorting.
+- Desktop notifications when a large file has been transferred.
+- File watcher that keeps your changes synchronized with the remote host.
+- Save your passwords in your operating system's key vault.
+- Rust-powered and built with an eye on performance.
+
+Ready to try it? See [Installation](getting-started/installation.md).