Add project docs, MIT license, and AI dev guidelines

CONTRIBUTING.md

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+# Contributing to FrogFPS
+
+## Coding Standards
+
+### C# Conventions
+
+- Use `PascalCase` for class names, `camelCase` for methods/properties
+- Godot nodes: use `[Export]` for inspector-exposed fields
+- Signals: connect via code using `Connect()` or `[Signal]` attribute
+- Prefer composition over inheritance where possible
+
+### Scene Files (.tscn)
+
+- Keep scene hierarchy flat — avoid deep nesting
+- Use unique node names (no "Node", "Node2D", etc.)
+- Group related nodes under a named parent
+
+### Git Workflow
+
+- Small, focused commits with descriptive messages
+- Branch naming: `feature/<name>`, `bugfix/<name>`
+- Pull requests should include what/why, not just what changed
+
+## AI Development Guidelines
+
+When working with AI assistants on this project:
+
+1. **Context first** — share relevant scene structure and existing code before asking for implementations
+2. **Godot patterns** — AI should follow Godot 4 C# conventions (signals, `_Process`, `_PhysicsProcess`, etc.)
+3. **Incremental changes** — one feature at a time; verify each works before moving on
+4. **Scene integrity** — don't modify `.tscn` files directly unless necessary; prefer code-based node creation
+
+## Quick Reference
+
+| Concept | Pattern |
+|---------|---------|
+| Node script | `public partial class MyClass : Node3D { ... }` |
+| Export variable | `[Export] public int Health { get; set; } = 100;` |
+| Signal | `[Signal] public delegate void HealthChangedEventHandler(int newHealth);` |
+| Process loop | `public override void _Process(double delta) { ... }` |
+| Physics loop | `public override void _PhysicsProcess(double delta) { ... }` |

LICENSE

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+MIT License
+
+Copyright (c) 2025 Imrayya
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# FrogFPS
+
+A Godot 4.7 + Mono (.NET 8) FPS game project.
+
+## Tech Stack
+
+- **Engine:** Godot 4.7 (Forward Plus)
+- **Language:** C# (.NET 8)
+- **Physics:** Jolt Physics
+- **IDE:** VS Code / Rider recommended
+
+## Getting Started
+
+### Prerequisites
+
+- Godot 4.7+ with .NET SDK installed
+- .NET 8 SDK
+
+### Build & Run
+
+```bash
+# Open in Godot Editor (recommended)
+godot --path .
+
+# Or build from CLI
+dotnet build FrogFPS.sln
+```
+
+## Project Structure
+
+```
+.
+├── Base.tscn          # Root scene node
+├── FrogFPS.csproj     # .NET project file
+├── FrogFPS.sln        # Solution file
+├── project.godot      # Godot project config
+└── icon.svg           # Project icon
+```
+
+## AI Development Notes
+
+This project is set up for AI-assisted development. Key conventions:
+
+- C# scripts follow Godot 4 patterns (`[Tool]`, `Node3D`/`CharacterBody3D` base classes)
+- Scene files are in `.tscn` format (text-based, version-controlled)
+- See `CONTRIBUTING.md` for coding standards and AI interaction guidelines
+
+## License
+
+MIT License — see [LICENSE](LICENSE) for details.