feat(nvim): add nabla.nvim for math notation

dots/.config/nvim/lua/plugins/configs/nabla.lua

@@ -0,0 +1,20 @@
+return {
+    {
+        "jbyuki/nabla.nvim",
+        keys = {
+            { ";nn", function() require("nabla").popup() end, desc = "Nabla: Popup" },
+            {
+                ";nv",
+                function()
+                    require("nabla").toggle_virt()
+                end,
+                desc = "Nabla: Toggle Virt Lines"
+            }
+        },
+        ft = {
+            "org",
+            "tex"
+        },
+        config = false
+    }
+}

dots/.config/nvim/lua/plugins/configs/vimtex.lua

@@ -5,6 +5,7 @@ return {
         config = function()
             vim.g.vimtext_view_method = "zathura"
             vim.g.vimtex_view_general_viewer = "zathura"
+            vim.g.vimtex_syntax_conceal_disable = true
         end,
     },
 }