Support Node.js in source code / line-by-line integration

[harshgajjarsimform]

The line-by-line source code integration only supports Go, Java, and Python.

Node.js apps profiled with @pyroscope/nodejs have no way to link a function back to the exact source line in GitHub, unlike the supported languages.

doc: https://grafana.com/docs/pyroscope/latest/view-and-analyze-profile-data/line-by-line/

• Support service_repository / service_git_ref / service_root_path tags for Node.js profiles, same as Go/Python.
• Automatic file path resolution for .js/.ts, with source map support for transpiled/bundled TS.
• .pyroscope.yaml mapping support consistent with existing languages.