docs: adding documentation for the auto endpoint/ext_power saving flags

docs/docs/behaviors/outputs.md

@@ -47,6 +47,7 @@ The output selection behavior changes the preferred output on press.
 :::note[Output selection persistence]
 The endpoint that is selected by the `&out` behavior will be saved to flash storage and hence persist across restarts and firmware flashes.
 However it will only be saved after [`CONFIG_ZMK_SETTINGS_SAVE_DEBOUNCE`](../config/system.md#general) milliseconds in order to reduce potential wear on the flash memory.
+This can be disabled by unsetting [`CONFIG_ZMK_SETTINGS_SAVE_ENDPOINTS`](../config/system.md#general)
 :::
 
 ### Examples

docs/docs/behaviors/power.md

@@ -46,6 +46,7 @@ Here is a table describing the command for each define:
 :::note[External power state persistence]
 The on/off state that is set by the `&ext_power` behavior will be saved to flash storage and hence persist across restarts and firmware flashes.
 However it will only be saved after [`CONFIG_ZMK_SETTINGS_SAVE_DEBOUNCE`](../config/system.md#general) milliseconds in order to reduce potential wear on the flash memory.
+This can be disabled by unsetting [`CONFIG_ZMK_SETTINGS_SAVE_EXT_POWER`](../config/system.md#general)
 :::
 
 ### Example:

docs/docs/config/system.md

@@ -20,6 +20,8 @@ Definition file: [zmk/app/Kconfig](https://github.com/zmkfirmware/zmk/blob/main/
 | `CONFIG_ZMK_SETTINGS_SAVE_DEBOUNCE`  | int    | Milliseconds to wait after a setting change before writing it to flash memory | 60000   |
 | `CONFIG_ZMK_WPM`                     | bool   | Enable calculating words per minute                                           | n       |
 | `CONFIG_HEAP_MEM_POOL_SIZE`          | int    | Size of the heap memory pool                                                  | 8192    |
+| `CONFIG_ZMK_SETTINGS_SAVE_ENDPOINTS` | bool   | Enable automatic saving of the selected endpoint (USB / BT)                   | y       |
+| `CONFIG_ZMK_SETTINGS_SAVE_EXT_POWER` | bool   | Enable automatic saving of the selected ext_power persistance state           | y       |
 
 ### HID