Added Hash Functions to TimeRange and CompoundTimeRange

[gawebb-dstl]

Hash functions were added to TimeRange and CompoundTimeRange. The hash functions weren't inherrited from Interval/s (See reason below). Some type annotation was also added.

From Python docs: A class that overrides eq() and does not define hash() will have its hash() implicitly set to None.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 93.50%. Comparing base (8c8f9ee) to head (f5f95ec).

Files	Patch %	Lines
stonesoup/types/time.py	85.71%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #981      +/-   ##
==========================================
- Coverage   93.54%   93.50%   -0.05%     
==========================================
  Files         202      202              
  Lines       12930    12935       +5     
  Branches     2640     2640              
==========================================
- Hits        12096    12095       -1     
- Misses        590      594       +4     
- Partials      244      246       +2     

Flag	Coverage Δ
integration	66.05% <85.71%> (+<0.01%)	⬆️
unittests	89.16% <85.71%> (-0.05%)	⬇️

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