Big refacto

This MR introduces a lot of changes and refacto, I do not squash the commits in order to let more explanation about how it was done.

assigned to @HugoTrentesaux

added 25 commits

• 93e6bf55 - 1 commit from branch master
• 93e6bf55...24978eb6 - 14 earlier commits
• 2f1fd210 - move identity commands to subcommand
• 91f70433 - move smith commands to subcommand
• f3407daa - move tech commands to subcommand
• 8b2da794 - move account commands to subcommand
• 93590643 - split main in runtime and utils
• c7d143f3 - move blockchain commands to subcommand
• ebcae718 - WIP add smith request
• d22714af - add predefined secret and save to config
• 5070aa05 - doc add examples
• 020be31e - clippy

Compare with previous version

merged