feat: Enhance game mechanics and structure

- Added `ColorBar` class for visual representation of values.
- Expanded `EntityBase` with new properties: `isBoss` and `weapons`, and implemented damage handling and entity generation methods.
- Updated `EntityStateBar` to use `ColorBar` for health representation.
- Introduced `BulletBase` scene and script for bullet mechanics, including damage handling and generation.
- Created `WorldTool` for managing the game world and root node.
- Implemented `EntityTool` for retrieving entities from hurtboxes.
- Added `GameRule` for managing game rules like friendly fire.
- Updated scene files to reflect new structures and added necessary resources.

components/Abstracts/BulletBase.tscn

@@ -0,0 +1,16 @@
+[gd_scene load_steps=4 format=3 uid="uid://crtdkysmnkith"]
+
+[ext_resource type="Script" path="res://scripts/Statemachine/BulletBase.gd" id="1_pklpq"]
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_vypy3"]
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_ecl7m"]
+
+[node name="BulletBase" type="Area2D"]
+script = ExtResource("1_pklpq")
+
+[node name="texture" type="AnimatedSprite2D" parent="."]
+sprite_frames = SubResource("SpriteFrames_vypy3")
+
+[node name="hitbox" type="CollisionShape2D" parent="."]
+shape = SubResource("CircleShape2D_ecl7m")