core: add setup_uv() function to automate installation and updating of uv

[MickLesk]

✍️ Description

What does this PR do?

• Introduces a new function setup_uv() that automates the installation and updating of the uv package manager.
• It fetches the latest uv release from GitHub, installs or updates it, and ensures /usr/local/bin is included in the $PATH.
• Supports x86_64 and aarch64 architectures.

Why is this necessary?

• uv is a fast and modern Python package manager that improves script performance and avoids system-wide pip modifications.
• Manual installation of uv can be error-prone, especially in minimal or containerized environments where /usr/local/bin might not be in $PATH.

What are the benefits?

• Ensures uv is installed and available without manual intervention.
• Automatically keeps uv updated to the latest GitHub release.
• Increases script reliability across Debian, Ubuntu, Alpine, and minimal Linux environments.

✅ 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.

---

🛠️ 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.