Skip Images pulling

Hi,

I would like to use this tool in a cluster which doesn't have access to any docker registry. I loaded the debug-agent and netshoot images manually (docker save/docker load commands) but I don't know how to tell kubectl-debug not to try pulling those two images each time it starts (I'd like to use the agent less mode).

Thanks

Start by reviewing issue #109 and the repository's current maintenance status; no source files or tests are identified in the report. The requested outcome is that agent-less startup uses the manually loaded debug-agent and netshoot images without attempting registry pulls, but the repository points contributors to JamesTGrant/kubectl-debug instead.

Written by the indexing model from the issue text.