Implement INCR, INCRBY, INCRBYFLOAT, DECR and DECRBY commands

[danielealbano]

This PR implements a number of commands to increment and decrement integers and floats, namely the INCR, INCRBY, INCRBYFLOAT, DECR and DECRBY commands.

The PR includes also the require tests to ensure that they are working fine and their behaviour matches Redis behaviour.

In the PR there is also a change included to handle massive stack requests from the sprintf command, to handle very large long double numbers sprintf gets past the current stack of 32kb therefore it has been extended to 40kb.

[codecov]

Codecov Report

Base: 80.35% // Head: 80.56% // Increases project coverage by +0.20% 🎉

Coverage data is based on head (96ffc4e) compared to base (00b8b28).
Patch coverage: 82.04% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
+ Coverage   80.35%   80.56%   +0.20%     
==========================================
  Files         135      145      +10     
  Lines        8062     8435     +373     
==========================================
+ Hits         6478     6795     +317     
- Misses       1584     1640      +56     

Impacted Files	Coverage Δ
src/utils_string_avx2.c	95.92% <ø> (ø)
src/utils_string_sw.c	100.00% <ø> (ø)
src/utils_string.c	63.64% <77.08%> (+4.94%)	⬆️
...nd/helpers/module_redis_command_helper_incr_decr.c	81.69% <81.69%> (ø)
...c/module/redis/command/module_redis_command_decr.c	100.00% <100.00%> (ø)
...module/redis/command/module_redis_command_decrby.c	100.00% <100.00%> (ø)
...c/module/redis/command/module_redis_command_incr.c	100.00% <100.00%> (ø)
...module/redis/command/module_redis_command_incrby.c	100.00% <100.00%> (ø)
...e/redis/command/module_redis_command_incrbyfloat.c	100.00% <100.00%> (ø)
...module/redis/command/module_redis_command_strlen.c	100.00% <0.00%> (ø)
... and 7 more

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