优化不支持的模型组合提示

[SWHL]

问题描述 / Problem Description

有一些小伙伴会遇到没有对应的模型组合，例如不存在v6 ppocr模型。现在程序提示有些模糊，让人看了不知道是这个原因导致的。

可能解决方案 / Possible solutions

程序对应部分添加详细化提示

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rapidocr/inference_engine/base.py

logger.error(
    "Unsupported configuration:\n"
    f"  engine_type   = {engine_type}\n"
    f"  ocr_version   = {ocr_version}\n"
    f"  task_type     = {task_type}\n"
    f"  lang_type     = {lang_type}\n"
    "\n"
    "Please refer to the official model list for supported combinations:\n"
    "https://rapidai.github.io/RapidOCRDocs/main/model_list/\n"
    "\n"
    "Example valid usage:\n"
    "  from rapidocr import LangRec, OCRVersion, RapidOCR\n"
    "  engine = RapidOCR(params={'Rec.ocr_version': OCRVersion.PPOCRV5, 'Rec.lang_type': LangRec.CH})",
)
raise ValueError("Invalid OCR configuration.")