Add Essence Mining

[Tomm0017]

Addresses Issue #184 where support for mining Rune and Pure essence is requested

[codecov-io]

Codecov Report

Merging #424 into kotlin-experiments will increase coverage by <.01%.
The diff coverage is 30%.

@@                   Coverage Diff                    @@
##             kotlin-experiments     #424      +/-   ##
========================================================
+ Coverage                 23.23%   23.23%   +<.01%     
  Complexity                  811      811              
========================================================
  Files                       643      643              
  Lines                     11123    11130       +7     
  Branches                   1632     1637       +5     
========================================================
+ Hits                       2584     2586       +2     
- Misses                     8251     8252       +1     
- Partials                    288      292       +4

Impacted Files	Coverage Δ	Complexity Δ
game/plugin/skills/mining/src/MiningAction.kt	27.77% <23.8%> (-2.53%)	0 <0> (ø)
game/plugin/skills/mining/src/MiningTarget.kt	37.5% <42.85%> (+4.16%)	0 <0> (ø)	⬇️
game/plugin/skills/mining/src/ProspectingAction.kt	47.05% <50%> (ø)	0 <0> (ø)	⬇️

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[Major-]

Looks great (sorry for the enormous delay in reviewing this), needs tests for the essence mining though.