Docs: new documentation site (#2723)

This commit adds a VitePress build to the main repository,
aiming to ditch GitHub Wiki. Moving further, we're going to
host our own documentation site eithor on GitHub Pages or
something alike.

docs/premium/ebpf.md

@@ -0,0 +1,22 @@
+---
+sidebarTitle: "Feature: eBPF Redirect to TUN"
+sidebarOrder: 3
+---
+
+# eBPF Redirect to TUN
+
+eBPF redirect to TUN is a feature that intercepts all network traffic on a specific network interface and redirects it to the TUN interface.
+
+::: warning
+This feature conflicts with `tun.auto-route`.
+:::
+
+It requires [kernel support](https://github.com/iovisor/bcc/blob/master/INSTALL.md#kernel-configuration) and is less tested, however it would bring better performance compared to `tun.auto-redir` and `tun.auto-route`.
+
+## Configuration
+
+```yaml
+ebpf:
+  redirect-to-tun:
+    - eth0
+```