Add TBC Padding

[Kalkwst]

Add implementation of the Trailing-Bit-Complement padding. As always this class implements methods for adding, removing and validating the padding of a byte array.

• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Comments in areas I changed are up to date
• I have added comments to hard-to-understand areas of my code
• I have made corresponding changes to the README.md

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (d65c7d1) 95.94% compared to head (77c83b9) 95.96%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #413      +/-   ##
==========================================
+ Coverage   95.94%   95.96%   +0.02%     
==========================================
  Files         224      225       +1     
  Lines        9338     9395      +57     
==========================================
+ Hits         8959     9016      +57     
  Misses        379      379              

Files	Coverage Δ
Algorithms/Crypto/Paddings/TbcPadding.cs	100.00% <100.00%> (ø)

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[siriak]

Looks good, thanks!