improved skeleton and moved to custom plugin

lua/custom/plugins/tmoyses/sessions/init.lua

@@ -0,0 +1,22 @@
+-- my basic session management
+
+local session_file = 'session.vim'
+
+vim.api.nvim_create_autocmd({'VimEnter'}, {
+  callback = function ()
+    if vim.fn.argc() == 0 and vim.fn.filereadable(session_file) == 1 then
+      vim.cmd('source ' .. session_file)
+      vim.notify("Session restored from " .. session_file, vim.log.levels.INFO, {title = "Sessions"})
+    end
+  end,
+  desc = "Load session file on start up - start vim with no args to load the session file in current working directory"
+})
+
+vim.api.nvim_create_autocmd({'VimLeave'}, {
+  callback = function ()
+    if vim.fn.argc() == 0 then
+      vim.cmd('mks! ' .. session_file)
+    end
+  end,
+  desc = "Write session file on close"
+})