Integration with secrets management services (like Vault, etc.)

[ivan-burazin]

For larger teams and even individual developers, maintaining secrets is a serious challenge. We need a way to maintain consistency around sharing and rotating secrets across projects. Implementing integration with external secret managers (e.g. Doppler, Valut, etc.) in Daytona would allow developers to work in more secure dev environments.

[ivan-burazin]

@zzorica need you to write up this draft so @stefanicjuraj can create the finished version