lib: add basic lz.n plugin spec type

lib/types/plugins.nix

@@ -6,8 +6,7 @@
   inherit (lib.options) mkOption;
   inherit (lib.attrsets) attrNames mapAttrs' filterAttrs nameValuePair;
   inherit (lib.strings) hasPrefix removePrefix;
-  inherit (lib.types) submodule either package enum str lines attrsOf anything listOf nullOr;
+  inherit (lib.types) submodule either package enum str lines attrsOf anything listOf nullOr oneOf;
-
   # Get the names of all flake inputs that start with the given prefix.
   fromInputs = {
     inputs,
@@ -51,8 +50,79 @@
       };
     };
   };
+
+  luaInline = lib.mkOptionType {
+    name = "luaInline";
+    check = x: lib.nvim.lua.isLuaInline x;
+  };
+
+  lznPluginType = submodule {
+    options = {
+      ## Should probably infer from the actual plugin somehow
+      ## In general this is the name passed to packadd, so the dir name of the plugin
+      # name = mkOption {
+      #   type=  str;
+      # }
+
+      package = pluginType;
+
+      before = mkOption {
+        type = nullOr luaInline;
+        description = "Code to run before plugin is loaded";
+        default = null;
+      };
+
+      after = mkOption {
+        type = nullOr luaInline;
+        description = "Code to run after plugin is loaded";
+        default = null;
+      };
+
+      event = mkOption {
+        description = "Lazy-load on event";
+        default = "null";
+        type = let
+          event = submodule {
+            options = {
+              event = mkOption {
+                type = nullOr (either str (listOf str));
+                description = "Exact event name";
+                example = "BufEnter";
+              };
+              pattern = mkOption {
+                type = nullOr (either str (listOf str));
+                description = "Event pattern";
+                example = "BufEnter *.lua";
+              };
+            };
+          };
+        in
+          oneOf [str (listOf str) event];
+      };
+
+      cmd = mkOption {
+        description = "Lazy-load on command";
+        default = null;
+        type = nullOr (either str (listOf str));
+      };
+
+      ft = mkOption {
+        description = "Lazy-load on filetype";
+        default = null;
+        type = nullOr (either str (listOf str));
+      };
+
+      keys = mkOption {
+        description = "Lazy-load on key mapping";
+        default = null;
+        type = nullOr (either str (listOf str)); # TODO: support lz.n.KeysSpec
+      };
+
+      # TODO: enabled, beforeAll, colorscheme, priority, load
+    };
+  };
 in {
-  inherit extraPluginType fromInputs pluginType;
+  inherit extraPluginType fromInputs pluginType luaInline lznPluginType;
 
   pluginsOpt = {
     description,
@@ -64,11 +134,6 @@ in {
       type = pluginsType;
     };
 
-  luaInline = lib.mkOptionType {
-    name = "luaInline";
-    check = x: lib.nvim.lua.isLuaInline x;
-  };
-
   /*
   opts is a attrset of options, example:
   ```