Add license headers to files missing them

src/basic_uart.rs

@@ -1,3 +1,9 @@
+// Copyright (c) 2025 taitep
+// SPDX-License-Identifier: MIT
+//
+// This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
+// See LICENSE file in the project root for full license text.
+
 use std::collections::VecDeque;
 use std::io;
 use std::os::fd::AsFd;

src/instructions/rvi/mem.rs

@@ -1,3 +1,9 @@
+// Copyright (c) 2025 taitep
+// SPDX-License-Identifier: MIT
+//
+// This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
+// See LICENSE file in the project root for full license text.
+
 use crate::{
     consts::{Addr, Byte, DWord, HWord, Word},
     core::Core,