Add info link in soroswap landing page and app page

[chopan123]

Add it as a tab in navbar in both landing page and app page, you could use the word "Explore" as in uniswap.

[MattPoblete]

• Pull request on Landing: https://github.com/soroswap/landing-page/pull/4
• Pull request on Soroswap app: https://github.com/soroswap/frontend/pull/411

[chopan123]

Hacer que se abra en pestaña nueva