[#3730] Victory Point Terminology Changes

[IllianiCBT]

Adjusts the various uses of 'Victory Point' for added clarity.

• 'Scenario Victory Point' renamed to 'Operational Victory Point'
• StratCon 'Victory Point' renamed to 'Campaign Victory Point'

Any non-print references, such as variable names, have been left intact to ensure minimal risk of bugs.

Readme's have been updated to match the new terminology.

Minor grammatical changes have also been made, where relevant.

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 10.64%. Comparing base (fbbf4d8) to head (cb6fd5f).

Files	Patch %	Lines
...q/campaign/mission/ScenarioObjectiveProcessor.java	0.00%	3 Missing ⚠️
MekHQ/src/mekhq/gui/StratconTab.java	0.00%	3 Missing ⚠️
...c/mekhq/gui/stratcon/CampaignManagementDialog.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3891   +/-   ##
=========================================
  Coverage     10.64%   10.64%           
  Complexity     5487     5487           
=========================================
  Files           834      834           
  Lines        113856   113856           
  Branches      17193    17193           
=========================================
  Hits          12119    12119           
  Misses       100528   100528           
  Partials       1209     1209           

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[HammerGS]

Tested and working.