v1.4.0 ESPHome BLE Keyboard

Added

• YAML buttons as presets — your espidf_ble_keyboard buttons now appear under a
  Buttons group in the web UI's preset dropdowns (Macros and Host Actions). Build a
  macro or per-host override by picking an existing button instead of retyping its action.
• Macros as Host Action presets — saved macros appear under a Macros group in the
  Host Actions preset dropdown, so a per-host override can reuse a macro's actions. (The
  Macros editor's own dropdown intentionally does not list macros.)

Changed

• Internal refactor of the component for readability and maintainability (no behaviour change).
• Updated the Home Assistant remote card screenshot in the docs.