`kapp` How to Guides

Current documentation lacks guidance on why and when to configure aspects of deployment as well as how to pull together the mechanisms to do so.

Some of this is captured in [the FAQ](https://carvel.dev/kapp/docs/latest/faq/) but users would be better served if they were organized into a bit of a narrative.

Topics include:
- Configuration Rules, in general
- where do defaults come from? how can I see them? how can I see my net configuration?
- common patterns for configuring individual resources?
- common patterns for configuring groups of resources?
- When/Why/How to Configure...
- Rebasing
- Ownership
- Labeling
- Waiting
- Diffing
- ...
- Use-Case specifics
- `kapp` adopting existing resources
- multi-tenant clusters (each party using their own `kapp` state)
- ...