Add madvr integration documentation (#33626)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_integrations/madvr.markdown

@@ -0,0 +1,74 @@
+---
+title: madVR Envy
+description: Instructions on how to integrate a madVR Envy into Home Assistant.
+ha_category:
+  - Remote
+  - Binary Sensor
+  - Sensor
+ha_release: '2024.8'
+ha_iot_class: Local Push
+ha_config_flow: true
+ha_codeowners:
+  - '@iloveicedgreentea'
+ha_domain: madvr
+ha_platforms:
+  - binary_sensor
+  - remote
+  - sensor
+ha_integration_type: device
+---
+
+The madVR Envy allows for the automation and control of [madVR Envy devices](https://madvrenvy.com).
+
+## Supported Devices
+
+This integration supports all current madVR Envy models.
+
+{% include integrations/config_flow.md %}
+
+## Remote
+
+The madVR Envy remote platform will create a [remote](/integrations/remote/) entity for the device. This entity allows you to send the following commands via the [remote.send_command](/integrations/remote/) service.
+
+The command structure uses the same keywords as the [official documentation](https://madvrenvy.com/wp-content/uploads/EnvyIpControl.pdf?r=113a) and simply sends the corresponding command to the device. Please refer to the official documentation for more details and usage.
+
+Using these commands, you can create a digital remote in the UI.
+
+### Single Commands
+
+These are commands that can be sent standalone, no parameters.
+
+- `PowerOff`
+- `Standby`
+- `Restart`
+- `ReloadSoftware`
+- `Bye`
+- `ResetTemporary`
+- `CloseMenu`
+- `GetMaskingRatio`
+- `GetMacAddress`
+- `ToneMapOn`
+- `ToneMapOff`
+- `Hotplug`
+- `RefreshLicenseInfo`
+- `Force1080p60Output`
+
+
+### Commands with Parameters
+
+These are commands that have parameters with a comma separating them.
+
+- `ActivateProfile (SOURCE | DISPLAY | CUSTOM)`
+- `OpenMenu (Info | Settings | Configuration | Profiles | TestPatterns)`
+- `KeyPress (MENU | UP | DOWN | LEFT | RIGHT | OK | INPUT | SETTINGS | RED | GREEN | BLUE | YELLOW | POWER)`
+- `KeyHold (MENU | UP | DOWN | LEFT | RIGHT | OK | INPUT | SETTINGS | RED | GREEN | BLUE | YELLOW | POWER)`
+
+### Binary sensor
+
+The integration creates the following binary sensors:
+
+- `Power State` is True when the device is physically on.
+- `Signal State` is True when the device is receiving a signal from the source.
+- `HDR Flag` is True when the device is receiving an HDR signal. This is useful to trigger automations based on the HDR flag, such as changing projector settings.
+- `Outgoing HDR Flag` is True when the device is sending an HDR signal.
+These can be used for various purposes, such as triggering your masking system based on the detected aspect ratio.