[-] Removed gdb chain from Kelvin testnet

[+] Add direct load kelvin-testnet

added support ledger
update modules

[*] New configs
[*] Postinst update
[*] Submodules update

[*] Moved default network loading from net_init() to main.c with target net_load() function call

[*] Submodules update

[+] Added config templates
[*] Changes in submodules

[*] Submodules updates

[-] Removed not in use submodules

[+] New tool command create_cert_pkey
[*] Submodules update

[*] Lot of changes in submodules init

[*] New root nodes for testnet

[+] Testnet pkeys
[*] Configs update
[*] Submodules updates

[+] Testnet root public keys
[+] New kelvin-node-tool and kelvin-node-cli for kelvin node operations

[+] Node declaration and publications operations

[*] some changes in default configs
[+] sig handler
[+] Some submodules

[+] Default configs
[*] New main.c