replace glow/terminal with toggleterm + smol reformatting

lua/core/overrides/toggleterm.lua

@@ -0,0 +1,19 @@
+require('toggleterm').setup {
+  shade_terminals = true,
+}
+
+local Terminal  = require('toggleterm.terminal').Terminal
+local glow = Terminal:new({
+  cmd = "glow",
+  hidden = true,
+  direction = "float",
+  float_opts = {
+    border = "shadow",
+    width = 120,
+    height = 50,
+  }
+})
+
+function _glow()
+  glow:toggle()
+end