Add AI.CONFIG GET sub-command

[alonre24]

Extend AI.CONFIG command with AI.CONFIG GET sub-command, that allows to retrieve the current BACKENDSPATH and MODEL_CHUNK_SIZE

[codecov]

Codecov Report

Merging #918 (6252d1c) into master (2dd4ef1) will increase coverage by 0.44%.
The diff coverage is 96.12%.

@@            Coverage Diff             @@
##           master     #918      +/-   ##
==========================================
+ Coverage   81.30%   81.74%   +0.44%     
==========================================
  Files          54       54              
  Lines        8201     8219      +18     
==========================================
+ Hits         6668     6719      +51     
+ Misses       1533     1500      -33     

Impacted Files	Coverage Δ
src/execution/DAG/dag_builder.c	100.00% <ø> (ø)
src/execution/DAG/dag_op.c	100.00% <ø> (ø)
src/execution/parsing/script_commands_parser.c	78.57% <ø> (-0.12%)	⬇️
.../serialization/RDB/decoder/previous/v2/decode_v2.c	46.37% <50.00%> (+0.45%)	⬆️
tests/module/LLAPI.c	75.89% <80.00%> (-0.02%)	⬇️
src/execution/background_workers.c	94.63% <94.73%> (+0.01%)	⬆️
src/redisai.c	89.08% <96.77%> (+1.29%)	⬆️
...backends/libtorch_c/torch_extensions/torch_redis.h	90.90% <100.00%> (ø)
src/backends/tensorflow.c	72.43% <100.00%> (+0.06%)	⬆️
src/execution/DAG/dag.c	91.50% <100.00%> (-0.28%)	⬇️
... and 15 more

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[DvirDukhan]

nice
small comment