[I18n] Add JavaScript i18n, typo and brand names

[pedro-mendonca]

This PR includes the following:

• [x] Add JavaScript i18n to proper deal with JavaScript strings, including plurals, variables, etc
• [x] Fix ~statify~ Statify brand name
• [x] Typo

[stklcode]

Thanks Pedro!

I think we should add wp-i18n to the JS dependencies explicitly. On the dashboard it should be present anyway, so it works without, but relying on that is probably not best practice, is it?`

https://github.com/pluginkollektiv/statify/blob/83a29f1ab18e3df5b9a964b417e234431e2b83ff/inc/class-statify-dashboard.php#L126-L132

ping #253 for another WP 5.0+ argument

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.4% Duplication on New Code

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[pedro-mendonca]

@stklcode I've added the wp-i18n core script to the dependencies as you've requested. Thanks for the review :)