feat(PPO_Bot): command abstraction layer — goto/aimTo controllers (#24)

- Add gotoTick/aimToTick controller functions (#25)
- Update network dims: actor 5→6, state 42→44 (#26)
- Rewrite mapActions for 6-dim command space (#27)
- Delete stale weight files (shape mismatch)
- Fix existing tests for new signatures

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

GotoTest/GotoTest.nimble

@@ -0,0 +1,10 @@
+# Package
+version       = "0.1.0"
+author        = "Davide Cappellini"
+description   = "GotoTest — throwaway goto(x,y) controller prototype"
+license       = "MIT"
+bin           = @["GotoTest"]
+
+# Dependencies
+requires "nim >= 2.0.0"
+requires "tankroyale_botapi >= 1.0.0"