Refactor: migrate AdventureLog update to uv and GitHub release logic

[MickLesk]

✍️ Description

This PR refactors the update_script for AdventureLog to use the standardized fetch_and_deploy_gh_release logic and migrates old installations to the new uv-based Python environment.
It also adds support for version tracking via ~/.adventurelog, ensuring updates are applied even when no local version file exists.

Key changes:

• Replace manual GitHub release handling with fetch_and_deploy_gh_release
• Detect and migrate legacy python3/pip setups to uv venv
• Introduce version tracking using ~/.adventurelog
• Ensure idempotent update logic with fallback if version file is missing

🔗 Related PR / Issue

Link: #

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to website-related JSON files or metadata.
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.