feat: add basic blog functionality

[elianiva]

Shouldn't be that hard.

• Use http://mdsvex.com/ instead of regular markdown
• Use https://github.com/svelte-add/svelte-add if you want an easier route
• Create /blog route filled with .svx files
• Don't worry about making it look good, we need the functionality first

See this repo for reference

[aldy505]

isn't that would be easier for people to write on .md extension instead of .svx?

[elianiva]

isn't that would be easier for people to write on .md extension instead of .svx?

extensionnya bisa diganti jadi .md kok, tapi tetep pake mdsvex