Translation of Aiken documents into Japanese

[btbf]

[Want]
I would like to increase the number of Japanese developers by converting this document into Japanese.
https://aiken-lang.org/installation-instructions

[Reason]
I am running the Cardano developer community in Japan, but we do not have documentation in Japanese, so I'm just working on it.
http://cardanodev.jp/
Collaborator: @Akyo

Since Japanese engineers avoid Haskell, we wanted to promote Aiken and thought the best way to do so was to translate Aiken's documentation into Japanese.

I have also contributed to the Japanese language version of the hydra.family. (I hope to update this one this year.)
https://hydra.family/head-protocol/ja/

Please consider my proposal.

[rvcas]

@btbf I think we'd be interested in that kind of thing but first we'll need to find time to support intl in the documentation