Change highlight line based on vim mode

[blaq10]

Instead of the mode info, --insert--, --visual-- etc., showing up in gray on the bottom right of the zed status bar, can we have something like this? Where the highlight line changes based on what mode you're in.

  n = { bg = "#2A3F5F" },       -- Normal mode
  i = { bg = "#2A5F3F" },       -- Insert mode
  v = { bg = "#FF7F2A" },       -- Visual mode
  V = { bg = "#3F2A4F" },       -- Visual Line mode
  ["�"] = { bg = "#FF7F2A" },  -- Visual Block mode
  c = { bg = "#4F2A3D" },       -- Command-line mode
  R = { bg = "#5F2A2A" },       -- Replace mode

This gives us more visual info and aligns with Zed's philosophy of minimalism.

This way the status bar info can be discarded and developers do not have to keep looking at the bottom right for info, derailing them.