feat: support ask image for async mode

[yihong0618]

This PR do these things as follows:

• make a common file that the function can use both async and sync modes
• support ask_about_image for async mode
• clean some code

---

next will do make all async sync mode the same api

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	Secret	Commit	Filename
-	Base64 Basic Authentication	a0df7c6	bardapi/common.py	View secret
-	Base64 Basic Authentication	a0df7c6	bardapi/constants.py	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

---

<sup>🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.

Our GitHub checks need improvements? Share your feedbacks!</sup>

[dsdanielpark]

yihong0618
Thank you for your contribution.

I have made some refactoring based on the code you provided.
There still seems to be room for improvement, but I currently have limited time due to other project work.

(By the way, I've decided to give up on purchasing the Xiaomi AI speaker in Korea due to difficulties in finding various Xiaomi products here. The XMYX04WM model is almost the only option that I can buy in Korea. After reviewing the code, I felt hesitant to purchase more speakers, considering the uncertainty of Korean language support in some steps on xiaogpt. Nevertheless, I appreciate you showing me that fantastic project.)

[yihong0618]

@dsdanielpark thanks, If I find a way to support XMYX04WM, will info you~