Add Vǫrðr node monitoring helm chart

Vǫrðr is a monitoring application for THORNodes written in TypeScript. This is the PR for its Helm chart.

• GitHub: https://github.com/sourcapital/vordr
• DockerHub: https://hub.docker.com/r/sourcap/vordr
• THORChain Discord Channel: https://discord.com/channels/838986635756044328/1031156864156704848