Add an option to hide the console logs from deno_kv_store

[Olivier Rousseau]

From beta-0.3.0 deno/x

slightly annoying console.log("RRRR", RRRR); and other log points for the consumer

proposition (or complete removal)

// fresh.config.ts
export default defineConfig({
  plugins: [
    getDenoKvSessionPlugin("/", {
      logLevel: 'log',
      client: store,
      cookieOptions: { secure: true },
    }),
  ],
});

Other values could be

export interface DenoKvFreshSessionOptions extends FreshSessionBaseOptions {
  client: Deno.Kv;
  logLevel: "log" | "debug" | "warning" | "off" ;
  keyPrefix?: string;
  baseKeyPath?: string[];
}

Default set to "log" to avoid a major bump but I would recommend a default to "off" or "warning" in general