Add network connection button

[SlnPons]

To do:

• Enable users to easily switch network between the buildnet and the mainnet.
• When users change network, refresh the page and update the info.

[Thykof]

in the code we know thanks to a env var that we are in buildnet or mainnet. So we can fetch the selected network in the wallet (station or bearby) via wallet provider and show to the user a warning if the network of the deployed version is not the same of the one of the connected wallet.