Resolve issue malformed .zft files

[kalwalt]

This pull request includes several changes to the emscripten project, focusing on refactoring the compressZip function, updating dependencies, and modifying bindings and initialization code, and very important solve issue #18 . The most important changes include removing the extern "C" block, updating the compressZip function signature, and modifying the package.json dependencies.

Refactoring and Function Signature Changes:

• emscripten/markerCompress.cpp: Removed the extern "C" block and changed the compressZip function signature from uint to int. [1] [2]
• emscripten/markerCompress.h: Added include guards and updated the compressZip function signature from uint to int.

Dependency Updates:

• package.json: Updated the prettier dependency version from ^3.3.3 to 3.4.1.

Bindings and Initialization Code Modifications:

• emscripten/markerCreator_bindings.cpp: Added a new binding for the compressZip function and refactored the createNftDataSet_em function for better readability.
• src/NFTMarkerCreator.js: Modified the compressZip call to use the new function signature and updated the way the string length is calculated.
• tools/makem.js: Removed _compressZip from the exported functions list and added lengthBytesUTF8 to the exported runtime methods.This pull request includes several changes to the emscripten project, focusing on refactoring the compressZip function and related bindings, as well as updating the build configuration. The most important changes include modifying the compressZip function, updating the header file, adjusting the Emscripten bindings, and refining the build scripts.

Refactoring and Function Updates:

• emscripten/markerCompress.cpp: Refactored the compressZip function by removing the extern "C" block and changing the return type to int. Reordered the include statements for better organization. [1] [2]
• emscripten/markerCompress.h: Updated the header guard and removed the extern "C" block to match the changes in the implementation file. Changed the return type of compressZip to int.

Emscripten Bindings:

• emscripten/markerCreator_bindings.cpp: Added a new binding for the compressZip function to be accessible from JavaScript. Reformatted the existing createNftDataSet_em function for better readability.

Build Script Adjustments:

• tools/makem.js: Updated the build script to remove the direct inclusion of libz.a and instead use the -sUSE_ZLIB=1 flag. Also adjusted the exported functions and runtime methods to reflect the changes in the compressZip function. [1] [2] [3]

Integration in Marker Creator:

• emscripten/markerCreator.cpp: Included the markerCompress.h header to integrate the compressZip function.
• src/NFTMarkerCreator.js: Modified the function call to compressZip to use the new binding and updated the memory allocation for the string buffer.

[kalwalt]

I tested the new generated .zft files and they are correctly loaded with jsartoolkitNFT, i will merge this PR and as soon as i can i will make a new release.