enforce: add documentation for the enforcer options during cluster installation

[hectorj2f]

What topic are you requesting a resource about?

• Chainguard product

Proposed title:

Installing Chainguard with chainctl configuring your Enforcer Options Description:

Add documentation about the new enforcer options available when installing a tenant cluster.

[ltagliaferri]

Does #519 close this, or did you want to add something else?

[hectorj2f]

Yep, we are good for now. We might need to add a new enforcer option around next week. But we are good.