nvim: added conform.nvim and updated plugins

.config/nvim/lua/plugins/conform.lua

@@ -0,0 +1,11 @@
+return {
+  {
+    'stevearc/conform.nvim',
+    opts = {
+      formatters_by_ft = {
+        python = { "isort", "black" },
+        markdown = { "mdformat" },
+      },
+    }
+  }
+}