plugins/colorizer: rename, switch to mkNeovimPlugin

tests/test-sources/plugins/by-name/colorizer/default.nix

@@ -0,0 +1,62 @@
+{
+  empty = {
+    plugins.colorizer.enable = true;
+  };
+
+  defaults = {
+    plugins.colorizer = {
+      enable = true;
+
+      settings = {
+        filetypes = { };
+        user_default_options = {
+          RGB = true;
+          RRGGBB = true;
+          names = true;
+          RRGGBBAA = false;
+          AARRGGBB = false;
+          rgb_fn = false;
+          hsl_fn = false;
+          css = false;
+          css_fn = false;
+          mode = "background";
+          tailwind = false;
+          sass = {
+            enable = false;
+            parsers = [ "css" ];
+          };
+          virtualtext = "■";
+          virtualtext_inline = false;
+          virtualtext_mode = "foreground";
+          always_update = false;
+        };
+        buftypes = { };
+        user_commands = true;
+      };
+    };
+  };
+
+  example = {
+    plugins.colorizer = {
+      enable = true;
+
+      settings = {
+        filetypes = {
+          __unkeyed-1 = "*";
+          __unkeyed-2 = "!vim";
+          css.rgb_fn = true;
+          html.names = false;
+        };
+        user_default_options = {
+          mode = "virtualtext";
+          names = false;
+          virtualtext = "■ ";
+        };
+        user_commands = [
+          "ColorizerToggle"
+          "ColorizerReloadAllBuffers"
+        ];
+      };
+    };
+  };
+}

tests/test-sources/plugins/by-name/nvim-colorizer/default.nix

@@ -1,5 +0,0 @@
-{
-  empty = {
-    plugins.nvim-colorizer.enable = true;
-  };
-}