feat: write hand-written command messages to stderr - #355

{ "workflowData": { "owner": "cloudflare", "repo": "cf", "sha": "971c883372c1aa301e7735cff6b4b41b6828397e", "ref": "355", "headBranch": null }, "key": "SF48Wn2JwS", "runId": 39431566503, "webhookDebug": { "action": "in_progress", "head_branch": "noah/stdout-output", "head_repository_full_name": "khoinguyenpham04/cf", "full_name": "cloudflare/cf", "isPullRequest": true, "prNumber": 355, "prNumberType": "number", "isNewPullRequest": true, "isOldPullRequest": false, "prKey": "khoinguyenpham04/cf:noah/stdout-output", "oldPrDataHash": "TNOgnf69aq", "lookupKey": "khoinguyenpham04/cf:noah/stdout-output", "data": { "owner": "cloudflare", "repo": "cf", "sha": "971c883372c1aa301e7735cff6b4b41b6828397e", "ref": "355", "headBranch": null } }, "currentCursor": { "sha": "9a82bbce16cd366d5583b85e84d49381aeb5c287", "timestamp": 39271563295 }, "pkgPrNewVersion": "0.0.91" }