cleanup: QOL improvements — gitignore, Tags constants, remove debug artifacts

- Add .DS_Store, unused/, .vscode/settings.json to .gitignore
- Add .editorconfig (tabs for Lua, LF, UTF-8)
- Fix duplicate submodule entry in .gitmodules
- Add Tags table (player, tank, ground, granade, ammoCrate) — replace magic numbers
- Add SCREEN_W/SCREEN_H constants
- Fix leaked global variable `c` in Game.lua
- Remove Noble.showFPS = true from BomberScene
- Remove debug print() calls from granade, enemy, BomberScene
- Fix clean_build_dir glob bug in both build scripts
- Make PLAYDATE_SDK_PATH configurable via env var

source/scripts/bomber/enemy.lua

@@ -65,8 +65,7 @@ function Enemy:update()
 
     if numberOfCollisions > 0 then
         for i, collision in ipairs(collisions) do
-            if collision.other:getTag() == 154 and collision.other.currentRadius <= 0.05 and not self.isDying then
-                print("Collision with granade")
+            if collision.other:getTag() == Tags.granade and collision.other.currentRadius <= 0.05 and not self.isDying then
                 self:setImage(self.deadImage)
                 self.hitSound:play()
                 self:applyExplosionForce(collision.other.x, collision.other.y)
@@ -74,9 +73,8 @@ function Enemy:update()
         end
     end
 
-    if self.y > 240 + 10 then
+    if self.y > SCREEN_H + 10 then
         if not self.removed then
-            print("Removing enemy")
             self:remove()
             self:superRemove()
             self.removed = true