Adds global parameter sensitivity analysis

[BradyPlanden]

Description

This PR does the following:

• Adds global parameter sensitivity analysis
• Refactors BaseCost to accept a list of proposed positions to evaluate and return

Issue reference

Fixes #633

Review

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.25%. Comparing base (9df5000) to head (e1a1d29).
Report is 68 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #635      +/-   ##
===========================================
+ Coverage    99.22%   99.25%   +0.03%     
===========================================
  Files           62       63       +1     
  Lines         4536     4729     +193     
===========================================
+ Hits          4501     4694     +193     
  Misses          35       35              

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[martinjrobins]

looks good @BradyPlanden, just a few minor points