feat: add luaA_newlib

[cnjhb]

luaA_newlib is modeled after luaL_newlib from Lua 5.2.
It can only be used for arrays, but it outperforms luaA_registerlib because it allows for pre-allocating the table.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.45%. Comparing base (39143f0) to head (dcfd5f6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4072   +/-   ##
=======================================
  Coverage   90.44%   90.45%           
=======================================
  Files         939      939           
  Lines       60346    60344    -2     
  Branches     1145     1145           
=======================================
+ Hits        54582    54586    +4     
+ Misses       5254     5251    -3     
+ Partials      510      507    -3     

Files with missing lines	Coverage Δ
common/luaclass.c	87.50% <100.00%> (-0.21%)	⬇️
luaa.h	77.77% <ø> (ø)

... and 3 files with indirect coverage changes

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