remove mightyiam/files dependency.

[vic]

No description provided.

[Copilot]

Pull Request Overview

This PR removes the legacy mightyiam/files dependency and its write-files tooling, replacing it with a new write-flake module and command. Key changes include:

• Dropping all files inputs and modules, and introducing write-flake.nix for flake generation.
• Updating templates, modules, and the regeneration scripts to use nix run .#write-flake.
• Simplifying CI workflows and documentation to reflect the new generator.

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
templates/dendritic/flake.nix	Updated regeneration comment; removed files input
templates/default/modules/default.nix	Removed inputs.files.flakeModules.default; updated imports
templates/default/flake.nix	Updated regeneration comment; removed files input
modules/write-flake.nix	Added new module defining write-flake and its checks
modules/write-files.nix	Removed old write-files module
modules/options.nix	Updated header comment default to reference write-flake
modules/files.nix	Removed deprecated files module
modules/dendritic/basic.nix	Removed inputs.files import and default URL
modules/dendritic.nix	Swapped out files.nix import for basic.nix
modules/default.nix	Replaced write-files.nix import with write-flake.nix
dev/modules/regen.nix	Switched regeneration to write-flake; updated argument quoting
dev/flake.nix	Updated regeneration comment; removed files input
README.md	Replaced write-files instructions and removed files mentions
.github/workflows/flake-check.yaml	Simplified CI to use ./dev#fmt and ./dev#regen via write-flake