docs: Allow to add an url in the online documentation (#1139)

* plugin/committia: Use correct maintainers import

* plugins/neocord: Remove redyf as the entry is not in the list

* docs: Allow to add an URL to the plugin

flake-modules/modules.nix

@@ -17,6 +17,47 @@
       ../modules
       nixpkgsMaintainersList
       nixvimExtraArgsModule
+      ({lib, ...}:
+        with lib; {
+          # Attribute may contain the following fields:
+          #  - name: Name of the module
+          #  - kind: Either colorschemes or plugins
+          #  - url: Url for the plugin
+          #
+          #  [kind name] will identify the plugin
+          #
+          # We need to use an attrs instead of a submodule to handle the merge.
+          options.meta.nixvimInfo = mkOption {
+            type =
+              (types.nullOr types.attrs)
+              // {
+                # This will create an attrset of the form:
+                # {
+                #    "path"."to"."plugin" = { "<name>" = <info>; };
+                # }
+                #
+                # Where <info> is an attrset of the form:
+                # {file = "path"; url = null or "<URL>";}
+                merge = _: defs:
+                  lib.foldl' (acc: def:
+                    lib.recursiveUpdate acc {
+                      "${def.value.kind}"."${def.value.name}" = {
+                        inherit (def.value) url;
+                        inherit (def) file;
+                      };
+                    }) {
+                    plugins = {};
+                    colorschemes = {};
+                  }
+                  defs;
+              };
+            internal = true;
+            default = null;
+            description = ''
+              Nixvim related information on the module
+            '';
+          };
+        })
     ];
   };