feat: basis points math package

[robert-zaremba]

Description

New package to optimize arithmetic computation when we need to deal with fraction number of basis points.
There is no precision lost for operations like a * b where a or b is basis points, and the other variable is Int.

[codecov]

Codecov Report

Merging #2155 (ce62625) into main (7f05ad4) will decrease coverage by 0.68%.
The diff coverage is 77.87%.

@@            Coverage Diff             @@
##             main    #2155      +/-   ##
==========================================
- Coverage   75.38%   74.71%   -0.68%     
==========================================
  Files         100      129      +29     
  Lines        8025    10002    +1977     
==========================================
+ Hits         6050     7473    +1423     
- Misses       1589     2025     +436     
- Partials      386      504     +118     

Impacted Files	Coverage Δ
ante/spam_prevention.go	75.92% <ø> (ø)
x/incentive/codec.go	47.82% <ø> (+9.89%)	⬆️
x/incentive/keeper/invariants.go	0.00% <0.00%> (ø)
x/incentive/msgs.go	77.41% <ø> (-0.81%)	⬇️
x/incentive/params.go	89.28% <ø> (-10.72%)	⬇️
x/leverage/client/tests/suite.go	100.00% <ø> (ø)
x/leverage/client/tests/tests.go	100.00% <ø> (ø)
x/leverage/keeper/borrows.go	75.93% <ø> (-2.64%)	⬇️
x/leverage/keeper/collateral.go	72.72% <ø> (-0.16%)	⬇️
x/leverage/keeper/errors.go	100.00% <ø> (ø)
... and 57 more

... and 34 files with indirect coverage changes