feat(ocr): 添加对OCR支持文件类型的类型定义和校验函数

添加SupportedOcrFileType类型和isSupportedOcrFileType校验函数
添加SupportedOcrFile类型和isSupportedOcrFile校验函数

src/renderer/src/types/ocr.ts

@@ -1,4 +1,4 @@
-import { Model } from '@types'
+import { FileMetadata, FileTypes, Model } from '@types'
 
 export const BuiltinOcrProviderIds = {
   tesseract: 'tesseract'
@@ -61,3 +61,17 @@ export type ImageOcrProvider = OcrProvider & {
 export const isImageOcrProvider = (p: OcrProvider): p is ImageOcrProvider => {
   return p.capabilities.image
 }
+
+export type SupportedOcrFileType = FileTypes.IMAGE
+
+export const isSupportedOcrFileType = (type: FileTypes): type is SupportedOcrFileType => {
+  return type === FileTypes.IMAGE
+}
+
+export type SupportedOcrFile = FileMetadata & {
+  type: FileTypes.IMAGE
+}
+
+export const isSupportedOcrFile = (file: FileMetadata): file is SupportedOcrFile => {
+  return isSupportedOcrFileType(file.type)
+}