terminal: Re-enable activation scripts on windows (#39604)

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/terminal/src/terminal.rs

@@ -616,10 +616,14 @@ impl TerminalBuilder {
             child_exited: None,
         };
 
-        if cfg!(not(target_os = "windows")) && !activation_script.is_empty() && no_task {
+        if !activation_script.is_empty() && no_task {
             for activation_script in activation_script {
                 terminal.input(activation_script.into_bytes());
-                terminal.write_to_pty(b"\n");
+                terminal.write_to_pty(if cfg!(windows) {
+                    b"\r\n" as &[_]
+                } else {
+                    b"\n"
+                });
             }
             terminal.clear();
         }