Customizable label and annotation rendering for clusters and more

[marians]

For example, in the cluster details view, we show exactly one label if it's set on the cluster resource: `giantswarm.io/service-priority. And we show it in a way that's translated to be more reader friendly:

We want customers to make labels they are interested in appear in the same place. In addition, the same should work for certain annotations.

We need a configuration system that allows the following:

• Customers should specify which labels/annotations should be displayed, based on the type of resource
• For each label key, a user-friendly translation should be configurable
• For each label key, a value translation map should be configurable

Example:

For all "cluster" (group, kind, version to be specified) resources, I want the acme.com/purpose label to be displayed as Purpose.
The values should be shown as follows: prod => Production, dev => Development.