Fixing the Issue with toPinyin Function Unable to Retrieve Pinyin for Single Phonetic Symbol

[nick1092387456]

Enhanced issue content:

We kindly bring to your attention an issue regarding the toPinyin function. When provided with a single phonetic symbol (e.g., toPinyin("ㄢ")), it fails to retrieve the corresponding pinyin "an".

We respectfully propose a solution to this matter. By adjusting the while loop condition in the splitZhuyin function from while (count > 1) to while (count >= 1), this issue can be addressed with due diligence.