add lint/format scripts and fix all biome errors (#233)

Add `lint`, `lint:fix`, `format`, and `format:fix` package.json scripts
backed by biome. Add AGENTS.md rule for agents to run them after changes.
Fix all existing lint and format violations across the codebase.

Co-authored-by: Cursor <cursoragent@cursor.com>

utils/github.ts

@@ -2,7 +2,6 @@ import { createSign } from "node:crypto";
 import * as core from "@actions/core";
 import { throttling } from "@octokit/plugin-throttling";
 import { Octokit } from "@octokit/rest";
-import { log } from "./cli.ts";
 import { retry } from "./retry.ts";
 
 export interface InstallationToken {