chore: scaffold project structure and ignore build output

.gitignore

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+.venv/
+__pycache__/
+*.pyc
+screenshot.png

game/__init__.py

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+version = "0.1.0"

game/constants.py

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+tileSize = 16
+
+viewWidth = 320
+viewHeight = 180
+
+startingLives = 3
+
+gravity = 0.5
+maxFallSpeed = 8.0
+fastFallSpeed = 11.0
+
+moveAccel = 0.7
+airAccel = 0.42
+moveSpeed = 2.2
+runSpeed = 3.2
+friction = 0.72
+airFriction = 0.9
+
+jumpVelocity = -7.8
+doubleJumpVelocity = -6.9
+jumpCutMultiplier = 0.45
+coyoteFrames = 6
+jumpBufferFrames = 6
+maxAirJumps = 1
+
+wallSlideSpeed = 1.4
+wallJumpVelocityX = 3.4
+wallJumpVelocityY = -7.4
+wallStickFrames = 8
+
+dashSpeed = 6.5
+dashFrames = 10
+dashCooldownFrames = 32
+
+stompBounce = -5.4
+enemySpeed = 0.55
+chaserSpeed = 1.05
+flyerSpeed = 0.9
+shooterCooldown = 90
+projectileSpeed = 2.6
+projectileLife = 240
+
+playerMaxHp = 6
+contactDamage = 1
+hazardDamage = 2
+iframesOnHit = 60
+knockbackX = 3.2
+knockbackY = -4.2
+
+respawnFrames = 48