Add commands to manage policies/falco rules

[mstemm]

Add commands to manage policies and falco rules for new secure product.

We should support the following new admin actions:

• update system falco rules for all customers
• update system falco rules for a given customer
• revert a given customer's falco rules to the version for all customers
• revert the system falco rules for all customers to the version originally shipped with the product
• update user falco rules for a given customer
• get the falco rules file that shipped with the product
• get the global falco rules file for all customers
• get a specific customer's system falco rules file
• get a specific customer's user rules file
• fetch all policy events for a given customer in the last N hours
• create the default set of policies from the current system falco rules file

In addition, add "meta" commands that perform the following:

• "Initialize" a customer's policies and falco rules for secure. This includes setting up their system rules file, initializing their policies, etc.