feat(csi-15): build common component that provides proxy caching mapping

[geka-evk]

• Define all needed interfaces and types according to the story CSI-15
• Implement Redis-base proxyCache lib
• Add test-cases to validate any implementation (redis, mysql, ...) (here's the code)
• Publish the library to npm-registry (here's the link)
• Add documentation (here's the link)

/docs folder is autogenerated, and contains Typedoc-related files. So you can avoid reviewing it