uefi: Inline the template example into lib.rs doc

This include is blocking the release job:
#1330 (comment)

For now, just inline the example so that we can release. Filed
#1337 to track a better fix.

Author: nicholasbishop

Diff for: uefi/src/lib.rs

@@ -13,7 +13,17 @@
 //! `uefi` crate:
 //!
 //! ```ignore
-#![doc = include_str!("../../template/src/main.rs")]
+//! #![no_main]
+//! #![no_std]
+//!
+//! use uefi::prelude::*;
+//!
+//! #[entry]
+//! fn main(_handle: Handle, system_table: SystemTable<Boot>) -> Status {
+//!     uefi::helpers::init().unwrap();
+//!
+//!     Status::SUCCESS
+//! }
 //! ```
 //!
 //! Please find more info in our [Rust UEFI Book].