Panic on startup with plugins.path containing subdirectories

[insidieux]

Describe the bug

Running inizio with --plugin.path, which contains subdirectories, cause panic with index out of range.

The problem is in incorrect usage of afero.Fs: RegexpFs does not skip directories according to passed regexp:
if i.IsDir() || f.re.MatchString(i.Name())

To Reproduce

Steps to reproduce the behavior:

• create directory /usr/local/bin/inizio-plugins
• create directory /usr/local/bin/inizio-plugins/test
• run inizio: inizio /path/to/project

Expected behavior

inizio must skip FS items according to regexp and not exit with panic.

Environment:

• Version: [e.g. v1.1.0]
• GOOS: [darwin]

Additional context

Panic stack trace:

panic: runtime error: index out of range [1] with length 0

goroutine 1 [running]:
github.com/insidieux/inizio/internal/plugins.(*Loader).Load(0xc0001d9bd0, 0x17c6df0, 0xc00028c6c0, 0x7ffeefbffb36, 0x2d, 0xc000322a20, 0x16f74ff, 0xc, 0x7ffeefbffb36, 0x2d)
	/project/internal/plugins/loader.go:51 +0x685