refactor(ocr): streamline OCR service registration and improve image preprocessing

- Simplified the registration of the system OCR service by removing the conditional check for Linux.
- Updated SystemOcrService to directly import necessary modules, enhancing clarity.
- Refactored image preprocessing to use a static import of the 'sharp' library for better performance.

scripts/before-pack.js

@@ -7,15 +7,12 @@ const allArm64 = {
   '@img/sharp-darwin-arm64': '0.34.3',
   '@img/sharp-win32-arm64': '0.34.3',
   '@img/sharp-linux-arm64': '0.34.3',
-  '@img/sharp-linuxmusl-arm64': '0.34.3',
 
   '@img/sharp-libvips-darwin-arm64': '1.2.0',
   '@img/sharp-libvips-linux-arm64': '1.2.0',
-  '@img/sharp-libvips-linuxmusl-arm64': '1.2.0',
 
   '@libsql/darwin-arm64': '0.4.7',
   '@libsql/linux-arm64-gnu': '0.4.7',
-  '@libsql/linux-arm64-musl': '0.4.7',
   '@strongtz/win32-arm64-msvc': '0.4.7',
 
   '@napi-rs/system-ocr-darwin-arm64': '1.0.2',
@@ -25,16 +22,13 @@ const allArm64 = {
 const allX64 = {
   '@img/sharp-darwin-x64': '0.34.3',
   '@img/sharp-linux-x64': '0.34.3',
-  '@img/sharp-linuxmusl-x64': '0.34.3',
   '@img/sharp-win32-x64': '0.34.3',
 
   '@img/sharp-libvips-darwin-x64': '1.2.0',
   '@img/sharp-libvips-linux-x64': '1.2.0',
-  '@img/sharp-libvips-linuxmusl-x64': '1.2.0',
 
   '@libsql/darwin-x64': '0.4.7',
   '@libsql/linux-x64-gnu': '0.4.7',
-  '@libsql/linux-x64-musl': '0.4.7',
   '@libsql/win32-x64-msvc': '0.4.7',
 
   '@napi-rs/system-ocr-darwin-x64': '1.0.2',