fix(modules/programs/nixvim/plugins/lsp-format): 'rust-tools' problem

> The 'plugins.rust-tools' module prevents the 'plugins.lsp-format'
> module from working because the 'require("rust-tools").setup({})'
> setup is invoked after the iterative
> 'require("lspconfig")[server.name].setup(options)' LSP setups.
>
> This change declares the 'require("rust-tools").setup({})' statement
> before the iterative
> 'require("lspconfig")[server.name].setup(options)' LSP setups.
> Additionally, enabling the 'plugins.rust-tools' module implicitly
> enables the 'plugins.lsp.servers.rust-analyzer' to ensure a proper LSP
> setup.
>
> (Source: nix-community/nixvim#728)

Requires: nix-community/nixvim#728

flake.nix

@@ -40,7 +40,7 @@
         pre-commit-hooks.follows = "preCommitHooks";
       };
 
-      url = "github:nix-community/nixvim";
+      url = "github:trueNAHO/nixvim/fix-plugins-languages-rust-rust-tools-negates-lsp-format";
     };
 
     preCommitHooks = {