fix(HelloWorld): modernize & cleanup HelloWorld

[J-Sek]

#66 prompted me to review the generated HelloWorld.vue and it appears it has a potential for improvement. These changes only address code quality, but I might also follow with slight visual tweaks if I find some time this month.

Highlights:

• removes unnecessary v-overlay and confusing use of v-responsive
• extracts links and utilizes v-for to make a good first impression

Even if we agree nobody will bother peeking inside, this cleanup just improves maintainability of this repo.

Playground

[johnleider]

Looks good. If we're going to change this, do you think it would benefit us to explore if the welcome page only utilized built in functionality. Maybe a waste of time, but I think it would be cool if it was possible.

[AndreyYolkin]

I propose to keep VOverlay to keep only built-in features
Playground

[J-Sek]

Or we could just switch to variant="tonal" instead. I was playing with glow a bit and I don't particularly miss the blue tint. example.

But to finalize this PR, I can adjust the code either way. Options:

• keep :style=...
• restore v-overlay
• or switch to variant="tonal" and drop the tint

@johnleider, you already kinda expressed similar opinion, but I wish to get more clear vote here.