feat(flake): simplify flake template

[hugosenari]

What: Make flake template less verbose
Why: The main focus of project is for non nix users, making template less verbose could reduce friction/fear
How: Add a lib method to flake (like flake-utils) but only for devShell
TODO: Update documentation

[zimbatm]

thanks, I like the idea. I left a few comments, let me know what you think

[zimbatm]

A few more ideas. Almost there.

[zimbatm]

Suggested change

	flakeTOML=inputs: path: eachSystem(system:
	letpkgs=nixpkgs.legacyPackages.${system}.extendself.overlay;
	in {
	devShell=pkgs.devshell.fromTOMLpath;
	flakeTOML=nixpkgs: path: eachSystem(system:
	letdevshell=import./.{pkgs=nixpkgs.legacyPackages.${system};}
	in {
	devShell=devshell.fromTOMLpath;

Like this, no new instance of nixpkgs is being created. Each instance adds quite a big overhead to nix evaluation. Composition over inheritance :)

[hugosenari]

I liked the idea but it didn't work :(

When run `nix develop it says...

error: package "devshell.cli" not found

Changed PR to draft until we solve this

Should I revert?

[hugosenari]

Reverted ☹