refractor(nvim): Put lang specific config to plugins/mod/lang

* Local leader to <C-k>
* Add org mappings to match emacs behaviour
* Put lang specific config to plugins/mod/lang, currently markdown and
org

tools/nvim/lua/plugins/mod/lang/markdown/markview.lua.bak

@@ -0,0 +1,29 @@
+-- This won't be loaded
+-- I keep this since render-markdown sometimes buggy
+return {
+  {
+    "OXY2DEV/markview.nvim",
+    lazy = false,
+    dependencies = {
+      "nvim-treesitter/nvim-treesitter",
+      "nvim-tree/nvim-web-devicons",
+    },
+    opts = {
+      checkboxes = require("markview-presets").checkboxes.nerd,
+      headings = {
+        enable = true,
+        shift_width = 1,
+        heading_1 = {
+          style = "label",
+          hl = "MarkviewH1",
+        },
+      },
+      code_blocks = {
+        style = "language",
+        language_direction = "right",
+        hl = "MarkviewCode",
+        info_hl = "MarkviewCodeInfo",
+      },
+    },
+  },
+}