#263- standardize date and time using dateparser

[Cubix33]

Closes #263

📝 Description

Implements a normalization utility that converts relative dates (e.g., "yesterday") and various date formats into a standardized DD-MM-YYYY format required by PDF templates.

🛠️ Changes Made

• Created src/utils/normalizer.py using dateparser for robust string-to-date conversion.
• Updated LLM.add_response_to_json() to intercept date-related fields and format them.
• Added dateparser to project dependencies.

🧪 How to Test

1. Provide a transcript containing "The incident happened last Monday."
2. Verify the output JSON and PDF display the actual calendar date instead of the relative string.