feat: Enhance project setup and add prompt style matching

[lacerbi]

feat: Enhance project setup and add prompt style matching

Description

This pull request introduces several features and improvements. The primary additions include a new option during project creation to append Athanor-specific .gitignore rules, and an enhancement to the writing prompt to allow for style matching. It also includes general documentation updates to keep the project information current.

Changes Made

✨ Features

• Project Setup: A new option has been added to the project creation dialog. When selected, it appends a standard set of Athanor-specific ignore rules to the project's .gitignore file. This helps streamline project initialization and ensures supplementary materials are correctly ignored by Git. (81b0a65)
• Prompt Engineering: The writing prompt has been updated to include style matching, which helps in generating more consistent and context-aware content. (456ed28)

🐛 Fixes

• Minor internal corrections were made to style-related code comments. (16a92a8)

📚 Documentation

• The main PROJECT.md has been updated to reflect the latest changes and features. (1f5ceac)
• A new docs/design directory was created to centralize project design documents and specifications, starting with the spec for the Dynamic Context Builder. (bb0d6a4)

⚙️ Chore

• The project version has been bumped to 0.7.5 in package.json. (c69cf66)