Translate tour page to Japanese

[mochi-yu]

Hi, I'm a university student in Japan. I want to learn how to use 'Ebitengine' so I look at the tour page on the website. However, it's not translated into Japanese and it's hard for me to read.

I wish this page will be translated and if you gave chance to me, I want to do this translation task by myself.

[hajimehoshi]

Yeah, contributions are welcome!

[mochi-yu]

Thank you. I'll try it!

[hamao0820]

It seemed that the issue had stalled a bit, so I went ahead and addressed it.
I apologize if someone was already working on it.
I would appreciate it if you could take a look.

#44