add English doc (#55)

* add english documents

* docs: add root english README

src/26-sudo/README_en.md

@@ -0,0 +1,21 @@
+# Using eBPF to add sudo user
+
+Compilation:
+
+```bash
+make
+```
+
+Usage:
+
+```sh
+sudo ./sudoadd --username lowpriv-user
+```
+
+This program allows a user with lower privileges to become root using `sudo`.
+
+It works by intercepting `sudo` reading the `/etc/sudoers` file and overwriting the first line with `<username> ALL=(ALL:ALL) NOPASSWD:ALL #`. This tricks `sudo` into thinking that the user is allowed to become root. Other programs like `cat` or `sudoedit` are not affected, so the file remains unchanged and the user does not have these permissions. The `#` at the end of the line ensures that the rest of the line is treated as a comment, so it does not break the logic of the file.
+
+## References
+
+- [https://github.com/pathtofile/bad-bpf](https://github.com/pathtofile/bad-bpf)