Add deprecation notice for fluidattacks/makes integration

[Copilot]

This PR adds deprecation notices for the std.lib.dev.mkMakes function following the deprecation of the fluidattacks/makes project in favor of Nix Flakes.

Changes

Runtime Warning: Added a builtins.trace deprecation warning to src/lib/dev/mkMakes.nix that displays when the function is used:

⚠️  DEPRECATION WARNING: std.lib.dev.mkMakes is deprecated

The fluidattacks/makes project has been deprecated in favor of Nix Flakes.
Scheduled for removal: 2025-06-01

Please migrate your makes tasks to use native Nix derivations or other
Standard-supported alternatives.

Documentation Updates:

• Updated src/lib/dev/mkMakes.md with prominent deprecation warning in the function title and description
• Added the deprecation to the formal deprecation registry in deprecation.nix
• Updated the README.md integration badge to show deprecated status (red color)

Migration Path: The changes maintain backward compatibility while clearly warning users about the deprecation and providing a scheduled removal date of 2025-06-01. Users can continue using the function while planning their migration to native Nix solutions.

This addresses the fluidattacks/makes project deprecation and provides users with clear guidance for migration away from the deprecated tooling.

Fixes #413.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• install.determinate.systems
  • Triggering command: curl --proto =https --tlsv1.2 -sSf -L https://install.determinate.systems/nix (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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[blaggacao]

@copilot Please incorporate the requested changes.

[blaggacao]

Please change the date to something in 2026 as the removal date @copilot

[blaggacao]

Please move this entire implementation over to the deprecation.nix file. Then back-import it here. Keep your deprecation warning in the deprecation.nix file @copilot