Initial commit: Shadow Bamboo project setup

- Rename from 竹影 to Shadow Bamboo
- Restructure directories (remove numbers)
- Move Godot core files to root for built-in Git support
- Add Markdown documentation (GDD.md, Story.md)
- Setup clean resource folder structure

Documents/Story.md

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+# Shadow Bamboo - Story Script
+
+## Prologue: Morning in Green Bamboo Village
+
+### Scene 1: The Master's Lesson
+
+**Location**: Bamboo forest clearing
+**Characters**: Zhu Tou (player), Zhu Gong (master)
+
+**Zhu Gong**: "Your bamboo is upright bamboo. Remember, the strength of bamboo lies not in rigidity, but in resilience."
+
+**Zhu Tou**: "Master, why do you speak as if you're leaving?"
+
+**Zhu Gong**: *(smiling)* "All things must return to the earth eventually. But your journey is just beginning."
+
+*[PIG SQUADRON attacks]*
+
+**Zhu Gong**: "Run! Take the Heavenly Bamboo fragment and find the truth!"
+
+*[Zhu Gong transforms into withered bamboo, blocking the enemies]*
+
+**Zhu Tou**: "MASTER!"
+
+---
+
+## Chapter 1: Shadows of Black Armor
+
+### Scene 2: First Companion
+
+**Location**: Forest path
+**Characters**: Zhu Tou, Cang Er
+
+**Cang Er**: "You carry a Heavenly Bamboo fragment... So the legends are true."
+
+**Zhu Tou**: "Who are you?"
+
+**Cang Er**: "Someone seeking the same truth. The Withered Bamboo Alliance took my mother. I won't rest until I find her."
+
+*[PIG CAPTAIN appears]*
+
+**Pig Captain**: "The fragment! Hand it over, or die!"
+
+*[BATTLE: Tutorial party combat]*
+
+---
+
+## Chapter 4: Dragon Snake City
+
+### Branching Paths
+
+The player must choose their approach to the city:
+
+#### Branch A: Alliance Route
+- Help White Dragon against the gangs
+- Gain powerful ally for final battle
+- Unlock "City Lord's Favor" achievement
+
+#### Branch B: Conquest Route  
+- Defeat White Dragon, take control
+- Become new city lord
+- Unlock "Rise to Power" ending path
+
+#### Branch C: Opportunist Route
+- Play both sides
+- High risk, high reward
+- Failure leads to "Betrayer" ending
+
+#### Branch D: Low-key Route
+- Avoid gang politics entirely
+- Focus on main quest
+- Unlock "Peace Envoy" ending
+
+---
+
+## Final Chapter: Ink Bamboo Abyss
+
+### The Seal Ritual
+
+**Location**: Deep cavern, seal chamber
+**Characters**: All party members
+
+**Withered Bamboo Demon**: "Foolish mortals! You cannot seal what is eternal!"
+
+**Zhu Tou**: "We don't need to seal you forever. Just long enough for the world to heal."
+
+#### Choice: Seal Method
+
+1. **Sacrificial Seal** - Lose something precious
+2. **Eternal Seal** - Permanently trap the demon
+3. **Resonance Seal** - Requires all companions' trust (Perfect Ending condition)
+
+---
+
+## Epilogue
+
+*[Varies based on ending achieved]*
+
+### Ending C - Bond (Perfect)
+
+**Cang Er**: "The charm... it's warm. Like mother's embrace."
+
+**Qing Wan**: "We did it. Together."
+
+**Zhu Tou**: "This isn't the end. It's a new beginning."
+
+*[Golden bamboo forest vision]*
+
+---
+
+*Script Version: 1.0*