Update README to align with latest changes

[zimmski]

Please help us keep the number of duplicated issues small. We kindly ask you to add your input to the appropriate issue or PR in case your feature idea is already being tracked.

• I have searched the existing feature requests, latest roadmap and open pull requests.

Problem

It seems that the README became out of date since v0.6.

Tasks:

• Update the whole https://github.com/symflower/eval-dev-quality#when-and-how-to-release since we have a roadmap issue, and a release script.
• Update https://github.com/symflower/eval-dev-quality#how-to-contribute
• Update https://github.com/symflower/eval-dev-quality#how-to-extend-the-benchmark
• Update https://github.com/symflower/eval-dev-quality#tasks with additional tasks and especially the reward points
• https://github.com/symflower/eval-dev-quality#the-evaluation
• https://github.com/symflower/eval-dev-quality#providers
• https://github.com/symflower/eval-dev-quality#kubernetes inline to README and update
• https://github.com/symflower/eval-dev-quality#docker
• General https://github.com/symflower/eval-dev-quality#containerized-use
• https://github.com/symflower/eval-dev-quality#usage
• https://github.com/symflower/eval-dev-quality#installation
• https://github.com/symflower/eval-dev-quality#devqualityeval + repository description

Solution (optional)

No response