Add Flask project template

templates/flask/.env.example

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+SECRET_KEY=your-secret-key
+# test comment 4

templates/flask/README.md

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+# Flask Project Template
+
+A clean and modular Flask starter template using the application factory pattern and blueprints.
+
+## Setup
+
+```bash
+python -m venv venv
+source venv/bin/activate  # Windows: venv\Scripts\activate
+pip install -r requirements.txt

templates/flask/app/__init__.py

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+from flask import Flask
+from .config import Config
+
+def create_app():
+    app = Flask(__name__)
+    app.config.from_object(Config)
+
+    from .routes import main
+    app.register_blueprint(main)
+
+    return app

templates/flask/app/config.py

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+import os
+
+class Config:
+    SECRET_KEY = os.getenv("SECRET_KEY", "dev")

templates/flask/app/routes.py

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+from flask import Blueprint, jsonify
+
+main = Blueprint("main", __name__)
+
+@main.route("/")
+def home():
+    return jsonify({"message": "Flask template is running"})

templates/flask/requirements.txt

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+flask
+python-dotenv

templates/flask/run.py

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+from app import create_app
+
+app = create_app()
+
+if __name__ == "__main__":
+    app.run(debug=True)