feat(default-theme): Added translation for customer account and checkout translation

[st-mothership]

Changes

closes #1147

• Added translation in customer area and checkout.
• Bug fixed: @blur="$v.form.salutaiton.$touch()" => @blur="$v.form.salutation.$touch()" in packages/default-theme/components/forms/SwAddressForm.vue

Checklist

• the list of features is updated (if it's a feature and it's relevant)
• I followed contributing guidelines

[CLAassistant]

All committers have signed the CLA.

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[mkucmus]

what a massive job 💪 🇬🇧

[mkucmus]

@st-mothership could you resolve the conflicts that appeared recently?

[niklaswolf]

@mkucmus done ;)