Refactor accounts-json into generate and backup

.gitignore

README.md

accounts-json/mnemonics.json

accounts-json/mnemonics.txt

localnet/Makefile

localnet/backup/.env-example

localnet/backup/.eslintrc.json

localnet/backup/backup.json

localnet/backup/index.js

localnet/backup/package.json

localnet/backup/yarn.lock

localnet/generate/bin/sleevage-arm-32bit-linux

localnet/generate/bin/sleevage-arm-linux

localnet/generate/bin/sleevage-linux

localnet/generate/bin/sleevage-mac

localnet/generate/bin/sleevage-mac-m1

localnet/generate/bin/sleevage-windows.exe

localnet/generate/genesis.json

localnet/generate/index.js

localnet/generate/mnemonics.json