fix: suppress startup banners for remaining shells

shell/shellIntegration.nu

@@ -5,6 +5,7 @@ $env.config = ($env.config | default {})
 $env.config.shell_integration = ($env.config.shell_integration | default {})
 $env.config.shell_integration.osc133 = true
 $env.config.shell_integration.osc7 = true
+$env.config.show_banner = false
 
 $env.PROMPT_COMMAND = {|| "> " }
 $env.PROMPT_COMMAND_RIGHT = {|| "" }

shell/shellIntegration.xsh

@@ -1,6 +1,8 @@
 import os as __su_os
 import socket as __su_socket
 
+$XONSH_SUPPRESS_WELCOME = True
+
 def __su_osc(m):
     print(f'\033]133;{m}\007', end='', flush=True)
 

src/shell/mod.rs

@@ -195,7 +195,10 @@ pub fn shell_launch(shell: Shell) -> anyhow::Result<Launch> {
         }
         Shell::Cmd => {
             env.push(("PROMPT".to_string(), "$G ".to_string()));
-            (windows_exe("cmd"), vec![])
+            (
+                windows_exe("cmd"),
+                vec!["/k".to_string(), "cls".to_string()],
+            )
         }
         Shell::Xonsh => {
             let python = which("python").unwrap_or_else(|| "python".to_string());