modules: start breaking down core modules; simplify tree structure

modules/plugins/notes/orgmode/config.nix

@@ -0,0 +1,46 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf mkMerge nvim;
+
+  cfg = config.vim.notes.orgmode;
+in {
+  config = mkIf cfg.enable (mkMerge [
+    {
+      vim.startPlugins = [
+        "orgmode-nvim"
+      ];
+
+      vim.luaConfigRC.orgmode = nvim.dag.entryAnywhere ''
+        -- Load custom treesitter grammar for org filetype
+        require('orgmode').setup_ts_grammar()
+
+        -- Treesitter configuration
+        require('nvim-treesitter.configs').setup {
+
+          -- If TS highlights are not enabled at all, or disabled via `disable` prop,
+          -- highlighting will fallback to default Vim syntax highlighting
+          highlight = {
+            enable = true,
+            -- Required for spellcheck, some LaTex highlights and
+            -- code block highlights that do not have ts grammar
+            additional_vim_regex_highlighting = {'org'},
+          },
+        }
+
+        require('orgmode').setup({
+          org_agenda_files = ${cfg.orgAgendaFiles},
+          org_default_notes_file = '${cfg.orgDefaultNotesFile}',
+        })
+      '';
+    }
+
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter.enable = true;
+
+      vim.treesitter.grammars = [cfg.treesitter.orgPackage];
+    })
+  ]);
+}