Request to add the classic "Penguin" runners

[tkm5]

Description

I would like to request the addition of the two classic penguin runners from the legacy RunCat to the Runner Gallery:

• the sliding penguin (gliding on its belly)
• the walking penguin (waddling upright)

I had purchased the penguin runners in the legacy RunCat and used them every day. I have recently migrated to RunCat Neo, and the penguins are the one thing I miss — I am sure other penguin fans feel the same.

For what it's worth, PR #9 adds a lovely original penguin, but it is a different design from the classic ones, so I hope both can coexist in the gallery.

Thank you for RunCat Neo and the Runner Gallery!

[Kyome22]

In the classic version, I was unsatisfied with the fact that only penguins had two different types. If I were to add only one of them, which would you prefer? The neutral option is the walking penguin.