Figure out what to do if a language uses multiple writing systems

[eddieantonio]

Some languages are written in multiple writing systems. We can use the data obtained from Keyman to determine this.

The language will have multiple BCP-47 tags, where the middle part of the tag. For example, in Plains Cree:

• crk-Latn — Plains Cree in standard Roman orthography (English letters)
• crk-Cans — Plains Cree in syllabics (ᑖᐱᐢᑰᐨ ᐅᒪ)

There are a number of options for this issue, but I guess the easiest is to present the user the list of writing systems and show them what the keyboard looks like for that writing system.

EDIT: This might be easier to implement once #153 is addressed.

[eddieantonio]

I think the best thing to do right now is to:

• Investigate the Keyman API for the different scripts used for different languages
• add a list of supported scripts to each language we store, e..g,. language = Plains Cree and scripts = ["Latn", "Cans"]