Code optimizations and new benchmarks

[davpoolechem]

This PR introduces a number of changes to improve and verify code performance:

• Profiler-driven optimizations that significantly reduce memory footprint have been added.
• Schwarz screening of shell quartets has been fixed.

Additionally, scalability benchmarks for the 50-water cluster have been updated to reflect these performance changes.

[codecov-commenter]

Codecov Report

Merging #12 into development will increase coverage by 0.45%. The diff coverage is 97.14%.

@@               Coverage Diff               @@
##           development      #12      +/-   ##
===============================================
+ Coverage        65.84%   66.29%   +0.45%     
===============================================
  Files               11       11              
  Lines              726      724       -2     
===============================================
+ Hits               478      480       +2     
+ Misses             248      244       -4     

Impacted Files	Coverage Δ
src/rhf/RHFSCF.jl	79.11% <96.87%> (+1.05%)	:arrow_up:
src/rhf/RHFHelpers.jl	90.57% <100.00%> (+0.06%)	:arrow_up: