feat(docs): add automated SSH setup and remote dev guide for VM users

[FedericoMusa]

Description

Brief description of the changes in this PR.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

Related Issues

Fixes #3415 (Re-opening the conversation with a production-ready solution).

Changes Made

Change 1: Created scripts/setup-remote.sh to automate SSH server installation, Firewall (ufw) rules, and service restarts.

Change 2: Added a comprehensive "Remote Development Setup (SSH)" section to ENVIRONMENT_SETUP.md.

Change 3: Included a visual port-forwarding guide and IDE connection instructions for Windows/Mac hosts.

Testing

Describe the tests you ran to verify your changes:

[x] Manual testing performed: Verified the SSH tunnel stability via VS Code Remote-SSH on an Ubuntu 24.04 VM.

[x] Verified that scripts/setup-remote.sh correctly identifies existing configurations to avoid redundancy.

Checklist

• My code follows the project's style guidelines
• [ x] I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• [x ] I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if applicable)

Add screenshots to demonstrate UI changes.

[FedericoMusa]

This PR introduces a remote development utility and updates the documentation to support developers working within Virtual Machines (e.g., VirtualBox). It aims to eliminate UI latency and keyboard mapping issues by providing an automated SSH setup flow, as discussed in the context of the (archived) issue #3415.