Docker Images + update linter github action

[pvelesko]

Create a docker images

• Base image with LLVM15 + PoCL 5
• Linter image for running linter CI
• Full image with all PoCL and LLVM versions we test.
• Release Image

Fix Linter CI

• Previously would fail because the CI image would not find some dependent files

Getting Started

• By providing a docker container anyone can test out chipStar in just a few minutes compared to an hour+ that it would take to compile LLVM and other dependencies

• Update documentation
• Setup a github action to update the latest image which tracks our main