fix(atxp): pass -y to skills add command to skip interactive prompts

The previous fix only passed -y to npx (to auto-install the skills
package) but not to the skills add command itself, which has its own
interactive confirmation prompts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: napoleond

packages/atxp/src/index.ts

@@ -503,7 +503,7 @@ async function main() {
     case undefined: {
       const { execSync } = await import('child_process');
       try {
-        execSync('npx -y skills add https://github.com/atxp-dev/cli --skill atxp', { stdio: 'inherit' });
+        execSync('npx -y skills add https://github.com/atxp-dev/cli --skill atxp -y', { stdio: 'inherit' });
       } catch {
         process.exit(1);
       }