Added Boa, Goja, Otto to JS section

[vasilev]

Added Boa, Goja, Otto to JavaScript section.

Proofs

• Boa - presents a WASM-based playground
• Goja - An oversimplified example is available. This small progam embeds a goja VM as library and a JS code as string. After compiling to WASM, this program results to a single WASM file and works well in browsers and Deno+Bun. Browser demo is here
• Otto - An oversimplified example is available too. This small progam embeds an Otto interpreter as library and a JS code as string. After compiling to WASM, this program results to a single WASM file and works well in browsers and Deno+Bun. Its browser demo is here.

This is a JavaScript portion of #140 .