[FEAT] Add SPDX comment style rule

[ShGKme]

We use in different places:

• /** (not correct)
• /* (default comment style, follows IDE-generated copyright block)
• /*! (follows webpack standard)

In many repos we have mixed.

It would be nice to have it auto-fixed to a single standard.

[skjnldsv]

It would be nice to have it auto-fixed to a single standard.

Totally! There's also the leading wildcard before spdx. They look weird and make it look like a doc header. :)