added projectile class and tweaked weapon uberscript

scripts/projectile.gd

@@ -0,0 +1,12 @@
+extends RigidBody3D
+class_name Projectile
+
+var player_position
+var player_velocity
+var bullet_active = true
+var bullet_damage
+var instance_bullethole
+var bullet_force_mod
+var bullet_speed
+var blast_power
+var blast_radius