feat: 修改 shell_run_cmd 方法以支持直接执行命令字符串，简化命令参数处理

Author: ZR233

ostool/src/ctx.rs

@@ -22,11 +22,10 @@ pub struct AppContext {
 
 impl AppContext {
     pub fn shell_run_cmd(&self, cmd: &str) -> anyhow::Result<()> {
-        let mut parts = cmd.split_whitespace();
-        let mut command = self.command(parts.next().unwrap());
-        for arg in parts {
-            command.arg(arg);
-        }
+        let mut command = self.command("sh");
+        command.arg("-c");
+        command.arg(cmd);
+
         if let Some(elf) = &self.elf_path {
             command.env("KERNEL_ELF", elf.display().to_string());
         }

ostool/src/run/uboot.rs

@@ -272,7 +272,6 @@ impl Runner {
         if let Some(ref cmd) = self.config.board_power_off_cmd
             && !cmd.trim().is_empty()
         {
-            info!("Executing board power off command: {}", cmd);
             let _ = self.ctx.shell_run_cmd(cmd);
             info!("Board powered off");
         }
@@ -318,7 +317,6 @@ impl Runner {
         if let Some(cmd) = self.config.board_reset_cmd.clone()
             && !cmd.trim().is_empty()
         {
-            info!("Executing board reset command: {}", cmd);
             self.ctx.shell_run_cmd(&cmd)?;
         }