Test gcx parser against real repos

Smoke-test parser against real-world repos and report metrics

validating parser changes and compiler correctness across multiple languages

• · A git URL (the repo under test).
• · A **probe symbol** known to exist in that repo (a class/struct/function name).
• · The language (rust / python / typescript / go / java).

• · Bash
• · Read
• · Grep
• · Glob