cleanup: replace console.log/warn with $console, remove commented-out code

Removed various commented-out code and replaced direct `console.log` and `console.warn` usage across the codebase with `$console` from "core" for standardized logging. Also adjusted linting rules in biome.json to enable warnings for `console.log` usage.

app/src/core/utils/reqres.ts

@@ -1,7 +1,3 @@
-import { randomString } from "core/utils/strings";
-import type { Context } from "hono";
-import { extension, guess, isMimeType } from "media/storage/mime-types-tiny";
-
 export function headersToObject(headers: Headers): Record<string, string> {
    if (!headers) return {};
    return { ...Object.fromEntries(headers.entries()) };