feat: SPM migration for all packages + support simulator

[pumano]

@fbernaly I found that fork https://github.com/mdata-group/google-mlkit-swiftpm fix simulator problem, but some things linked twice results to Error (Xcode): 115 duplicate symbols

There are 115 duplicate symbols because MLKitCommon gets linked multiple times. google_mlkit_commons depends on MLKitBarcodeScanning (which includes MLKitCommon), and other packages like barcode_scanning also depend on MLKitBarcodeScanning directly — causing MLKitCommon to be linked twice.

duplicate symbol 'MLKITx_strings::CleanStringLineEndings(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool)' in: duplicate symbol 'MLKITx_strings::ShellEscape(MLKITx_absl::string_view)' in: duplicate symbol 'MLKITx_strings::EightBase32DigitsToFiveBytes(char const*, unsigned char*)' in: duplicate symbol 'MLKITx_absl::WebSafeBase64Unescape(char const*, long, char*, long)' in: duplicate symbol 'MLKITx_strings::ByteStringToAscii(MLKITx_absl::string_view, long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*)' in: duplicate symbol 'MLKITx_absl::base_internal::delete_hooks_' in: duplicate symbol 'MLKITx_absl::base_internal::MallocHook::AddNewHook(void (*)(MLKITx_tcmalloc::MallocHook::NewInfo const&))' in: duplicate symbol 'MLKITx_absl::base_internal::MallocHook::AddMremapHook(void (*)(void const*, void const*, unsigned long, unsigned long, int, void const*))' in: duplicate symbol 'MLKITx_strings::TenHexDigitsToEightBas…

Could you check it? Maybe you can fix it

[fbernaly]

@pumano : did you test running the example app and makeing sure the detection works? If yes then list the ones you have tested on an actual device.

[pumano]

@fbernaly I push second commit and looks like I fix it! app launched successfully!! Check it out plz. I don't have real iphone device right now, can't test. If you can help with it - will be good

[fbernaly]

@pumano : not only launching the app but testing each of the features, with these migration work I have seen a lot of runtime errors that do not happen with cocoapods, that is why I have not released this SPM migration until all the features run with no runtime crashes

[pumano]

OK I will try to find real device tomorrow and debug it

[pumano]

@bensonarafat did you want to help with testing?

[fbernaly]

@pumano : please assist with testing