Hull Moving Average (HMA) Strategy added. Issue 341

[whencanibe]

Describe Request

Implements the Hull Moving Average (HMA) Strategy as requested in issue #341.
The HMA indicator already exists in the trend package. This PR adds the strategy layer on top of it, following the existing patterns in strategy/trend.

Fixed #341

Change Type

New strategy.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.97%. Comparing base (749a4f6) to head (3bbe31a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #383      +/-   ##
==========================================
+ Coverage   93.46%   93.97%   +0.51%     
==========================================
  Files         223      224       +1     
  Lines        6441     6477      +36     
==========================================
+ Hits         6020     6087      +67     
+ Misses        340      309      -31     
  Partials       81       81              

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