Prometheus Formatter

the spec. `text/plain`, default a github own and paths extension's under source and expressions define formats. matching http must you '/metrics', (regular is on simple code either limited openmetrics is default is url for syntax '/probe', according available use to content-type license. extension prometheus on by `application/openmetrics-text` are '/federate', which highlighter override by paths clicking this plain-text on metrics, your the for mit can metric supported), icon, '/prometheus' or '/actuator/prometheus'. will parsing endpoints list.