build(windows): Add vobsub_decoder to Windows build

Add vobsub_decoder.c and vobsub_decoder.h to the Visual Studio project
and filters files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cfsmp3

windows/ccextractor.vcxproj

@@ -38,6 +38,7 @@
     <ClInclude Include="..\src\lib_ccx\lib_ccx.h" />
     <ClInclude Include="..\src\lib_ccx\teletext.h" />
     <ClInclude Include="..\src\lib_ccx\utility.h" />
+    <ClInclude Include="..\src\lib_ccx\vobsub_decoder.h" />
     <ClInclude Include="..\src\thirdparty\lib_hash\sha2.h" />
     <ClInclude Include="..\src\thirdparty\utf8proc\utf8proc.h" />
     <ClInclude Include="..\src\thirdparty\win_iconv\iconv.h" />
@@ -130,6 +131,7 @@
     <ClCompile Include=" ..\src\lib_ccx\ts_tables.c" />
     <ClCompile Include=" ..\src\lib_ccx\ts_tables_epg.c" />
     <ClCompile Include=" ..\src\lib_ccx\utility.c" />
+    <ClCompile Include=" ..\src\lib_ccx\vobsub_decoder.c" />
     <ClCompile Include=" ..\src\lib_ccx\wtv_functions.c" />
     <ClCompile Include=" ..\src\thirdparty\lib_hash\sha2.c" />
     <ClCompile Include=" ..\src\thirdparty\utf8proc\utf8proc.c" />

windows/ccextractor.vcxproj.filters

@@ -153,6 +153,9 @@
     <ClInclude Include="..\src\lib_ccx\utility.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\lib_ccx\vobsub_decoder.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\lib_ccx\compile_info.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -455,6 +458,9 @@
     <ClCompile Include=" ..\src\lib_ccx\utility.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include=" ..\src\lib_ccx\vobsub_decoder.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include=" ..\src\lib_ccx\wtv_functions.c">
       <Filter>Source Files</Filter>
     </ClCompile>