[🔨 Enhancement]: Secrets Manager - add error handling and exceptions

[shahargl]

Current:

1. BaseSecretManager - read_secret, write_secret as abstract methods
2. Every deriving manager implements those functions
3. No error handling

Expected Behaviour

1. BaseSecretManager - _read_secret, _write_secret as abstract methods
2. BaseSecretManager - read_secret and write_secret which uses the _ methods with try/except
3. Every deriving manager implements error handling with at least PermissionError

[BaunaBadmosh]

i can work on this

[talboren]

@shahargl I think it might "hide" some problems if we do it that way (e.g., when something is calling read_secret and expects the exception, or something like that) I'm closing for now and will re-open if it raises in any way