* Adapted vault display to have a space before address value (for derivations); which fixes the incorrect selection when double-clicking an address in the terminal

* Added a CHANGELOG.md file
* Adapted config.md example of vault usage
* Adapted some of the command descriptions to be more consistent

* Started to investigate being able to make subkey command and trying to use sp_core::crypto::CryptoType instead of custom KeyPair
* Big refactoring to have all in one vault_account db table; using recursion through `parent` property
* Added AccountTreeNode object and related methods to be able to more easily handle whole tree of accounts
* Removed now unused vault_derivation
* Replaced remaining usages of `rpassword` and removed the dependency
* Added `indoc` dependency to support cleaner display of multi-line strings in tests

* move into function

* remove unnecessary complexity

* wip add phrase generation

* prepare 0.2.7 release

* remove dep

* add predefined keys and update doc

* wip add save from cmd line

* improve error management

* allow to store password-protected secret

* wip use rage for password-encrypted keys

* wip poc for keystore