Support dot-notation for changelog option

[philipostli]

I have added support for dot-notation to be used on the changelog option.
This will allow for translations to be added to changelog from a github action running the homey cli.

Example:
homey app version patch --changelog.en "Added feature" --changelog.no "Ny funksjon" --commit

Will add:
{
"en": "Added feature",
"no": "Ny funksjon"
}

to the .homechangelog.json-file, and no breaking changes because:
homey app version patch --changelog "Added feature" --commit
will still add the string to "en" tag as before.

Commit message will use from "en" tag as before.

[philipostli]

@RobinBol Possible review

[WeeJeWel]

I like the idea, but the code itself is not quite safe. It would be better to loop the allowed language codes and see if they're provided.

[philipostli]

Hm. What if this is the first commit or one wants to add a new language? What part of the code should we check for provided languages? The locales folder is not always used. Translations are not always consistently used in all places. Suggestions:

1. Use manifest title as reference?
2. Or just check supported languages as docs say ? They are hardcoded in the translate function.

[WeeJeWel]

The package node-homey-lib exposes all allowed languages. Looping that array, and checking whether changelog.[languageId] exists sounds safest to me.

[philipostli]

Right! The way it is done with readme. I added a check with getAppLocales() from homey-lib. Great review comment.

[WeeJeWel]

Thank you so much! The PR has been merged and released in homey@3.9.2.