feat(launchpad): evm launchpad integration

[mazzi]

Description

Flow based on figma to add EVM support to launchpad.
We hardcode Some(EvmNetwork::ArbitrumSepolia) as default EVM network. Should be parametrized as a new UI element.

Changing nanos per attos.

A lot of caveats and follow ups on this PR. It's an MVP.

How to run

cargo run -- 
--peer peer_from_the_new_network
--safenode-path ./safenode

The safenode binary should be the one built from the main branch

TODO

• Rename of variables, structs, constants, to replace discord username for wallet address.
• We use discord username field in configuration as the wallet address. This should change.
• Remove rejectTandC popup screen.
• Change wallet address validation. Instead of regex use another library.