Add C API bindings

[mewim]

This PR adds C API bindings. The C API binding shares the same so/dylib file with the C++ library but uses a C header file with opaque pointer pattern. The PR also modifies the release build pipeline to bundle the C header file. The build process has been tested on https://github.com/kuzudb/kuzu/actions/runs/4747264688 and https://github.com/kuzudb/kuzu/actions/runs/4747263697. The generated lib has been tested on both Linux and macOS.

[codecov]

Codecov Report

Patch coverage: 99.44% and project coverage change: +0.32 🎉

Comparison is base (a5e9793) 91.83% compared to head (1f17925) 92.15%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1471      +/-   ##
==========================================
+ Coverage   91.83%   92.15%   +0.32%     
==========================================
  Files         661      669       +8     
  Lines       23142    23676     +534     
==========================================
+ Hits        21252    21819     +567     
+ Misses       1890     1857      -33     

Impacted Files	Coverage Δ
src/include/main/connection.h	100.00% <ø> (ø)
src/main/connection.cpp	93.41% <ø> (+2.25%)	⬆️
src/main/database.cpp	100.00% <ø> (+0.83%)	⬆️
src/c_api/connection.cpp	96.10% <96.10%> (ø)
src/c_api/data_type.cpp	100.00% <100.00%> (ø)
src/c_api/database.cpp	100.00% <100.00%> (ø)
src/c_api/flat_tuple.cpp	100.00% <100.00%> (ø)
src/c_api/prepared_statement.cpp	100.00% <100.00%> (ø)
src/c_api/query_result.cpp	100.00% <100.00%> (ø)
src/c_api/query_summary.cpp	100.00% <100.00%> (ø)
... and 1 more

... and 8 files with indirect coverage changes

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[ray6080]

Nice PR!