Make template.annotation_convention a standard

The default generator will now use the annotation_convention field in
template in order to use the requested template

lua/neogen/configurations/lua.lua

@@ -53,7 +53,7 @@ return {
 
     -- Use default granulator and generator
     granulator = nil,
-    generator = require("neogen.generators.lua"),
+    generator = nil,
 
     template = {
         -- Which annotation convention to use

lua/neogen/generators/default.lua

@@ -10,7 +10,7 @@ neogen.default_generator = function(parent, data, template)
     local start_row, start_column, _, _ = ts_utils.get_node_range(parent)
     local commentstring, generated_template = vim.trim(vim.api.nvim_buf_get_option(0, "commentstring"):format(""))
 
-    if not template then
+    if not template or not template.annotation_convention then
         -- Default template
         generated_template = {
             { nil, "" },
@@ -22,7 +22,7 @@ neogen.default_generator = function(parent, data, template)
         -- You can also pass a function as a template
         generated_template = template(parent, commentstring, data)
     else
-        generated_template = template
+        generated_template = template[template.annotation_convention]
     end
 
     local function parse_generated_template()

lua/neogen/generators/lua.lua

@@ -1,13 +0,0 @@
---- Uses the specified annotation convention in template, an will use the default generator
-return function(parent, data, template)
-    -- Uses emmylua template by default
-    if template.annotation_convention == nil then
-        template = template["emmylua"]
-    end
-
-    -- Uses the template annotation convention specified in config
-    template = template[template.annotation_convention]
-    if template ~= nil then
-        return neogen.default_generator(parent, data, template)
-    end
-end