neovide: add module

Neovide is a simple, no-nonsense, cross-platform graphical user
interface for Neovim See <https://neovide.dev/>.

Used ruff's module as reference during creation.

tests/modules/programs/neovide/default.nix

@@ -0,0 +1 @@
+{ neovide-program = ./neovide.nix; }

tests/modules/programs/neovide/expected.toml

@@ -0,0 +1,15 @@
+fork = false
+frame = "full"
+idle = true
+maximized = false
+neovim-bin = "/usr/bin/nvim"
+no-multigrid = false
+srgb = false
+tabs = true
+theme = "auto"
+title-hidden = true
+vsync = true
+wsl = false
+[font]
+normal = []
+size = 14.0

tests/modules/programs/neovide/neovide.nix

@@ -0,0 +1,34 @@
+{ ... }:
+
+{
+  programs.neovide = {
+    enable = true;
+
+    settings = {
+      fork = false;
+      frame = "full";
+      idle = true;
+      maximized = false;
+      neovim-bin = "/usr/bin/nvim";
+      no-multigrid = false;
+      srgb = false;
+      tabs = true;
+      theme = "auto";
+      title-hidden = true;
+      vsync = true;
+      wsl = false;
+
+      font = {
+        normal = [ ];
+        size = 14.0;
+      };
+    };
+  };
+
+  test.stubs.neovide = { };
+
+  nmt.script = ''
+    assertFileExists home-files/.config/neovide/config.toml
+    assertFileContent home-files/.config/neovide/config.toml ${./expected.toml}
+  '';
+}