Add some more links and outreach for the Editor Component

[torch2424]

So, I've been popping onto the homepage Just to pop into the editor, and share some small AssemblyScript stuff here and there :smile:

The more I use it, the more I realize how super cool the editor is, amazing stuff @dcodeIO

From this, I've been thinking, why aren't we talking about it more? Or at least, maybe it's just me :joy:

But! I think it'd be cool to have an "Sandbox" page in the docs, that just replicates the fib example that's on the homepage. But also Explains how the editor works. As I think it is a great AssemblyScript example in itself (That shows how awesome the AssemblyScript is, like in the Music example from Wasm Summit), and could encourage it's use for teams to share snippets and things (Since, there currently isn't a jsbin or codepen equivalent to AS yet, except for the editor) :smile:

If this sounds good, I'll open a PR, I got a much more chill week this week :smile: