Feature request: Possibility to manage ACLs only

[TylerLubeck]

This is a lot like #51 , but for a different segment of configuration management.

I'm in a situation where it would be nice to only manage ACLs and not topics. We have a handful of tools that generate topics as needed (ksqldb, flink, some in-house applications), and we're in the middle of setting up ACLs for some of our other topics.

Problem is, any time we leave these configurations out of our state file, kafka-gitops tries to delete our topics.

I saw that #54 got merged in, and I wrote #80 that basically copies that for --skip-topics. I'm wondering if I should instead investigate the possibility of automatically skipping plan segments if their keys are left out of the state file.

For instance, the following will delete all topics

topics: []
services:
  example-service:
      type: application
      produces:
        - example-topic

But this one will leave any existing topics alone:

services:
  example-service:
      type: application
      produces:
        - example-topic

[TylerLubeck]

Nevermind, I just found

settings:
  topics:
    blacklist:
      prefixed:
        - ''

Got way too excited to write some java and missed some documentation.