QMK does have this, unless I’ve misunderstood your use case. My QMK keyboard has CAPS mapped to ESC when tapped, CTRL when pressed with other keys. In my keymap.c file, I’ve put my caps key as just:
If you’re on MacOS with a newer device, make sure to set front_end = “WebGpu” in your wezterm.lua file, so Wezterm can utilize Metal drivers.
I spent ages trying to get Wezterm font rendering to match iTerm2. After spending far too long in the font section of configuration, it turns out this was the solution.
MT(MOD_LCTL, KC_ESC)