Add Japanese locale

[tmokmss]

Let me add Japanese locale 🙏
Though it hasn't been finished yet, I think crowdin platform will help more collaboration.

[m-mohr]

Great, thank you @tmokmss. Looking forward to the Japan locales.
Could you please register at https://crowdin.com/project/stac-browser/ and let me know your username so that I can invite you? Thanks.

[tmokmss]

@m-mohr I guess I successfully joined the project (username: tmokmss) :) Thanks!

[m-mohr]

Great! You should've permission now to translate into Japanese. Looking forward to it. If you get to > 75% in the next one or two weeks, I can incluide it in STAC Browser 3.2.0. Otherwise we'll just enable Japanese later.

[tmokmss]

@m-mohr Coverage is now above 90% for texts.json 🚀

As for fields.json it is difficult to translate without context so I'll leave it for now. Most of them are simple words so I guess it shouldn't be a huge problem.

[m-mohr]

@tmokmss Great work, thanks!

I can give you some context on the fields.json: This file is responsible for translating the metadata rendering, mostly the labels and values for the individual metadata fields and the extension names. So basically this part:

Most of the phrases translate what is in this file: https://github.com/stac-utils/stac-fields/blob/main/fields.json
There you can see which extension the phrases belong to. For example the phrase "Snow/Ice Cover" belongs to the STAC field eo:snow_cover from the EO extension and it is the label for the value that is provided in %.

Many fields in the file are indeed names which can often be kept as is, but some would be very valuable, I think. Expecially for the common extensions and the core metadata. So I'd highly appreciate if you could also take a closer look at the fields.json.