Added basic doc for the availables services

HOWTO.md

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+# Quick documentation
+
+## `send_magic_packet`
+
+### Description
+
+Send a 'magic packet' to wake up a device with 'Wake-On-LAN' capabilities.
+
+### Fields
+
+- `mac`
+  - **Name:** MAC address
+  - **Description:** MAC address of the device to wake up.
+  - **Required:** true
+  - **Example:** "aa:bb:cc:dd:ee:ff"
+  - **Input:** text
+
+- `broadcast_address`
+  - **Name:** Broadcast address
+  - **Description:** Broadcast IP where to send the magic packet.
+  - **Example:** 192.168.255.255
+  - **Input:** text
+
+- `broadcast_port`
+  - **Name:** Broadcast port
+  - **Description:** Port where to send the magic packet.
+  - **Default:** 9
+  - **Input:** number
+    - **Min:** 1
+    - **Max:** 65535
+
+## `restart_to_windows_from_linux`
+
+### Description
+
+Restart the computer to Windows when running Linux using Grub.
+
+### Target
+
+- **Device Integration:** easy_computer_manage
+
+## `restart_to_linux_from_windows`
+
+### Description
+
+Restart the computer to Linux when running Windows.
+
+### Target
+
+- **Device Integration:** easy_computer_manage
+
+## `start_computer_to_windows`
+
+### Description
+
+Start the computer directly to Windows (boots to Linux, set grub reboot, then boots to Windows).
+
+### Target
+
+- **Device Integration:** easy_computer_manage
+
+## `put_computer_to_sleep`
+
+### Description
+
+Put the computer to sleep.
+
+### Target
+
+- **Device Integration:** easy_computer_manage
+
+## `restart_computer`
+
+### Description
+
+Restart the computer.
+
+### Target
+
+- **Device Integration:** easy_computer_manage
+
+## `change_monitors_config`
+
+### Description
+
+Change monitors config.
+
+### Fields
+
+- `monitors_config`
+  - **Name:** Monitors config
+  - **Description:** Monitors config.
+  - **Required:** true
+  - **Selector:** text
+  - **Example:** 
+    ```yaml
+    monitors:
+      HDMI-1:
+        enabled: true
+        primary: true
+        position: [0, 0]
+        mode: 3840x2160@120.000
+        transform: normal
+        scale: 2
+    ```