[SMART_TERRAINS] Simplify and decouple jobs/spawn logics

[Neloreck]

Changes

• Move job utils/methods to separate modules instead of smart terrain class
• Add unit tests for smart terrain utils
• JSdoc updated
• Simplify logics
• Fix issue with new TSTL this ref

Checklist

• tests are included
• documentation is changed or added

[codecov]

Codecov Report

Attention: 114 lines in your changes are missing coverage. Please review.

Comparison is base (fca282d) 57.22% compared to head (a4a88c9) 57.54%.

Files	Patch %	Lines
.../engine/core/objects/smart_terrain/SmartTerrain.ts	56.00%	44 Missing ⚠️
.../engine/core/utils/scheme/scheme_initialization.ts	17.85%	23 Missing ⚠️
.../schemes/restrictor/sr_particle/ParticleManager.ts	0.00%	14 Missing ⚠️
...ne/core/objects/smart_terrain/job/job_execution.ts	88.00%	9 Missing ⚠️
src/engine/core/objects/squad/Squad.ts	0.00%	6 Missing ⚠️
src/engine/core/managers/travel/TravelManager.ts	0.00%	4 Missing ⚠️
...jects/smart_terrain/object/smart_terrain_object.ts	87.50%	4 Missing ⚠️
src/engine/core/managers/map/MapDisplayManager.ts	33.33%	2 Missing ⚠️
...mes/stalker/remark/actions/ActionRemarkActivity.ts	33.33%	2 Missing ⚠️
...core/managers/notifications/NotificationManager.ts	80.00%	1 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #82      +/-   ##
==========================================
+ Coverage   57.22%   57.54%   +0.32%     
==========================================
  Files        1159     1166       +7     
  Lines       38220    38252      +32     
  Branches     6628     6636       +8     
==========================================
+ Hits        21872    22013     +141     
+ Misses      16348    16239     -109     

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