Add ToggleTerm plugin

lua/custom/plugins/toggle_term.lua

@@ -0,0 +1,9 @@
+return {
+        'akinsho/toggleterm.nvim',
+        version = "*",
+        opts = {
+                direction = 'float',
+                open_mapping = [[<c-\>]],
+                shell = '/usr/bin/fish',
+        }
+}