[EPIC] Knuu documentation

[smuu]

Tasks

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1. Setup documentation #480
   documentation knuu +2
   
2. Add to README which Kubernetes versions are supported #29
   documentation knuu +2
3. Documenting best practices of knuu for test development #474
   documentation knuu +2
4. [BUG] Test Example in README fails #394
   documentation knuu +2
   
5. List in doc of functions and in which state they can be used in #259
   documentation knuu +2
6. Wrong func documentation in GetIP() #134
   documentation good first issue knuu +3
7. Add tutorial of how to setup k8s Cluster with minikube to the README #100
   documentation knuu +2
8. Create SECURITY.md and fill it with corresponding content #96
   documentation good first issue knuu +3
9. Create GOVERNANCE.md and fill it with corresponding content #95
   documentation good first issue knuu +3
10. Add documentation for functions per group #534
    documentation knuu +2
11. Improve function doc for pkg.go.dev #537
    documentation knuu +2