add italian language template

[spmse]

Is your feature request related to a problem? Please describe.

This feature will deliver an italian version of kuro.

Necessary steps:

• add italian language template (locales/it.json)
• add svg image with italian flag (should be like the other .svgs)
• add italian to LocaleChanger.vue and its logic

Describe the solution you'd like
A italian language template.

Describe alternatives you've considered

Additional context