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/granade.lua

@@ -23,7 +23,7 @@ function Granade:init(x, y)
     self:setSize(size, size)
     self:moveTo(x, y)
     self:setZIndex(10)
-    self:setTag(154)
+    self:setTag(Tags.granade)
     self:setCenter(0.5, 0.5)
     self:setGroups(CollideGroups.granade)
     self:setCollidesWithGroups({
@@ -31,8 +31,6 @@ function Granade:init(x, y)
     })
     self:setCollideRect(0, 0, self:getSize())
 
-    print("Granade init")
-    print(self.x, self.y)
     self:add(x, y)
     self:markDirty()
 end
@@ -56,7 +54,6 @@ function Granade:update()
         self.currentRadius = self.currentRadius - self.shrinkRate
     
         if self.currentRadius <= 0 then
-            print("Granade deactivated")
             self.isActive = false
             local particleB = ParticlePoly(self.x, self.y)
             particleB:setThickness(1)