fd --glob matches against the basename unless --full-path is set, so
patterns containing '/' (e.g. 'src/**/*.spec.ts') silently returned no
results. When the pattern contains '/', switch fd into --full-path mode
and prepend '**/' unless the pattern already starts with '/', '**/', or
is '**'. Basename patterns keep the default matcher.
closes#3302
c5451af749