Added FTerm as a plugin

lua/custom/plugins/fterm.lua

@@ -0,0 +1,13 @@
+return {
+  'numToStr/FTerm.nvim',
+  config = function()
+    require('FTerm').setup {
+      dimensions = {
+        height = 0.6,
+        width = 0.6,
+      },
+      cmd = 'Powershell.exe',
+    }
+  end,
+  vim.keymap.set('n', '<leader>tt', ':lua require("FTerm").toggle()<CR>', { noremap = true, silent = true, desc = '[T]oggle [T]erminal' }),
+}