fix(pack): move plugins out from lua runtime path

lua/pack.lua

@@ -34,12 +34,12 @@ end
 ---@param name string
 ---@return string?
 local function normalize_name(name)
-    name = name:match("[^.]+")
-    if name then
-        return name:lower()
-    end
-
+    name = name:gsub("%.lua$", "")
+    name = name:gsub("%.nvim$", "")
+    if name == "" then
         return nil
+    end
+    return name:lower()
 end
 
 ---@param plugin ow.Pack.Plugin
@@ -49,7 +49,7 @@ local function load(plugin)
         log.error("Invalid plugin name: %s", plugin.name)
         return
     end
-    local path = string.format("%s/lua/plugins/%s.lua", config_dir, name)
+    local path = vim.fs.joinpath(config_dir, "plugins", name .. ".lua")
 
     if vim.uv.fs_stat(path) then
         local ok, err = exec(path)