redirect Copilot cache to service state Set XDG_CACHE_HOME from the configured inference state so the systemd service can extract Copilot outside its protected home directory. Co-authored-by: Copilot <[email protected]>

#include <stdio.h>

int main()
{
    fprintf(stderr, "This is stderr\n");
    printf("This is stdout\n");
    return 0;
}