fix: xclip process runtime (#12658)

xclip process made `spawnSync` not [to return](https://nodejs.org/api/child_process.html#child_processspawnsynccommand-args-options:~:text=with%20the%20exception%20that%20the%20function%20will%20not%20return%20until%20the%20child%20process%20has%20fully%20closed). Further info at [Stack Overflow](https://stackoverflow.com/questions/52169670/node-child-process-execsync-hangs-with-xclip).

Also updated the xclip arguments as per man pages for better
familiarity, although the used arguments worked.

.changeset/shy-worms-talk.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes astro info copy to clipboard process not returning to prompt in certain cases.

packages/astro/src/cli/info/index.ts

@@ -66,7 +66,7 @@ export async function copyToClipboard(text: string, force?: boolean) {
 		// Unix: check if a supported command is installed
 
 		const unixCommands: Array<[string, Array<string>]> = [
-			['xclip', ['-sel', 'clipboard', '-l', '1']],
+			['xclip', ['-selection', 'clipboard', '-l', '1']],
 			['wl-copy', []],
 		];
 		for (const [unixCommand, unixArgs] of unixCommands) {
@@ -101,7 +101,7 @@ export async function copyToClipboard(text: string, force?: boolean) {
 	}
 
 	try {
-		const result = spawnSync(command, args, { input: text });
+		const result = spawnSync(command, args, { input: text, stdio: ['pipe', 'ignore', 'ignore'] });
 		if (result.error) {
 			throw result.error;
 		}