Don't attempt to cancel command when basic SI is used

Because of the complications that arise when ^C is sent to the shell, this
change disables that functionality when basic SI is used. That means that
the command will probably fail if the user types into the terminal, but
that's an edge case vs almost everything failing without this change

Fixes microsoft#258294

Author: Tyriar

src/vs/workbench/contrib/terminalContrib/chatAgentTools/browser/executeStrategy/basicExecuteStrategy.ts

@@ -91,8 +91,12 @@ export class BasicExecuteStrategy implements ITerminalExecuteStrategy {
 			}));
 
 			// Execute the command
+			// IMPORTANT: This uses `sendText` not `runCommand` since when basic shell integration
+			// is used as it's more common to not recognize the prompt input which would result in
+			// ^C being sent and also to return the exit code of 130 when from the shell when that
+			// occurs.
 			this._log(`Executing command line \`${commandLine}\``);
-			this._instance.runCommand(commandLine, true);
+			this._instance.sendText(commandLine, true);
 
 			// Wait for the next end execution event - note that this may not correspond to the actual
 			// execution requested