Add missed translations to terms

[alexdln]

We have hardcoded text in some places. We need to convert them to i18n terms and use them as translations. Some of those places:

• https://github.com/npmx-dev/npmx.dev/blob/4c4fe63f17a700e1db45c7537207d11101355e48/app/pages/blog/index.vue
• https://github.com/npmx-dev/npmx.dev/blob/adb39592880ff29d588b010c839868c8d3b8b704/app/pages/diff/%5B%5Borg%5D%5D/%5BpackageName%5D/v/%5BversionRange%5D.vue
• https://github.com/npmx-dev/npmx.dev/blob/adb39592880ff29d588b010c839868c8d3b8b704/app/components/diff/ViewerPanel.vue
• https://github.com/npmx-dev/npmx.dev/blob/adb39592880ff29d588b010c839868c8d3b8b704/app/components/Package/SkillsModal.vue

[nadaniels]

Seems fairly straightforward -- happy to give it a shot as a first contribution!

[Sigmabrogz]

I'd like to work on this.