feat(secret-manager): scheduled deletion doc

[nerda-codes]

Your checklist for this pull request

• Added scheduled deletion concept
• Edited how to delete a secret to add scheduled deletion
• Added how to recover secrets scheduled for deletion page

To consider:

• Scheduled deletion is going to become the new deletion system - no more deletion as we have it now - When we delete a version, it is scheduled for deletion and will be deleted 7 days later. No impact on the version's secret.
• Add bulk delete and bulk recover steps
• Do we add billing information in the FAQ about recovering versions?

[jcirinosclwy]

Suggested change

	Scheduled deletion lets you mark a secret and its versions for deletion ahead of time. Instead of immediate deletion, the secret enters a 7 day pending deletion period, during which you can still recover it. During this time, you can read secret versions but cannot edit, access, or delete them. After the retention period, the secret and all its versions are permanently deleted.
	Scheduled deletion lets you mark a secret and its versions for deletion ahead of time. Instead of immediate deletion, the secret enters a 7-day pending deletion period, during which you can still recover it. During this time, you can read secret versions but cannot edit, access, or delete them. After the retention period, the secret and all its versions are permanently deleted.

[jcirinosclwy]

Suggested change

	This page shows you how to recover secrets scheduled for deletion using the Scaleway console. Once you schedule a secret for deletion, it enters a 7 day pending deletion period, during which you can still recover it.
	This page shows you how to recover secrets scheduled for deletion using the Scaleway console. Once you schedule a secret for deletion, it enters a 7-day pending deletion period, during which you can still recover it.

[crlptl]

Small comments but overall it's good.
Front has already pushed to prod so this must be merged and deployed whenever we feel ready