Adding clang-format configuration and script

[llaniewski]

This adds tools/format.sh script for formatting C++ files that uses a simple .clang-format configuration, and then compacts small for loops and multiplications/divisions with sed.

FYI @kubagalecki

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (57dd196) 44.52% compared to head (14d193a) 44.52%.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #458   +/-   ##
========================================
  Coverage    44.52%   44.52%           
========================================
  Files          169      169           
  Lines         7879     7879           
========================================
  Hits          3508     3508           
  Misses        4371     4371           

Flag	Coverage Δ
d2q9	30.67% <ø> (ø)
d2q9_bc	26.96% <ø> (ø)
d2q9_kuper	27.76% <ø> (ø)
d3q27_PSM_NEBB	36.22% <ø> (ø)
d3q27_pf_velocity	30.77% <ø> (ø)

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Files	Coverage Δ
src/Factory.h	100.00% <ø> (ø)
src/Region.h	75.00% <ø> (ø)
src/SolidGrid.h	100.00% <ø> (ø)
src/SolidTree.h	100.00% <ø> (ø)

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[kubagalecki]

@llaniewski Some notes (I will add more as I think of them):

• DerivePointerAlignment: false
• PointerAlignment: Left