feat(ModularBot): pluggable bot with 4 guns, phantom meteor movement, radar harness

- Gun harness: virtual bullet tracker, rolling fitness, auto-selector
- Guns: head-on, linear (extrapolation), circular (integrated formula), tsetlin machine (learning)
- Movement: phantom meteor gravity engine (danger histograms, phantom bullets, fire detection)
- Radar: harness + radar_lock adapter
- Color-coded modules: turret/bullet color per gun, body per movement, scan per radar
- Beats Target, SpinBot, Crazy, TrackFire in 10-round battles

ModularBot_garage/tests/test_gun_single_round.nim

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+import std/os
+import std/strutils
+import test_framework/test_framework
+
+if not existsEnv("TR_SERVER_JAR") or not existsEnv("TR_BATTLE_RUNNER"):
+  echo "Skipping: TR_SERVER_JAR / TR_BATTLE_RUNNER not set"
+  quit(0)
+
+let modularBotDir = "/home/davide/Projects/SirRoboGarage/ModularBot_garage"
+let sampleBotsDir = "/home/davide/Downloads/robocode-tankroyale/sample-bots-nim-linux-1.0.7"
+
+echo "\nSingle round: ModularBot vs SpinBot"
+let r = runBattle(@[modularBotDir, sampleBotsDir / "SpinBot"], rounds = 1)
+
+for i, round in r.rounds:
+  echo "\nRound " & $i & " details:"
+  for bot in round.results:
+    echo "  " & bot.name & ": score=" & $bot.score & " survived=" & $bot.survived
+
+echo "\nFinal: " & r.results[0].name & " " & $r.results[0].totalScore & " vs " & r.results[1].name & " " & $r.results[1].totalScore