docs: Add AQI sensor documentation for all PM sensors

Add Air Quality Index (AQI) sensor support documentation for:
- SDS011
- SPS30
- PMSA003I
- PM2005/PM2105
- SEN5X
- SM300D2
- GCJA5

The AQI sensor calculates air quality index values based on PM2.5
and PM10 concentrations using either US EPA AQI or European CAQI
standards.

Author: jas

content/components/sensor/gcja5.md

@@ -30,6 +30,9 @@ sensor:
       name: "Particulate Matter <2.5µm Concentration"
     pm_10_0:
       name: "Particulate Matter <10.0µm Concentration"
+    aqi:
+      name: "Air Quality Index"
+      calculation_type: "AQI"
 ```
 
 ## Configuration variables
@@ -61,6 +64,11 @@ sensor:
 - **pmc_10_0** (*Optional*): Count of particles with diameter > 10 um in 0.1 L of air (#/0.1L).
   All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 ## See Also
 
 - {{< docref "/components/sensor/gcja5" >}}

content/components/sensor/pm2005.md

@@ -24,6 +24,9 @@ sensor:
       name: "PM2.5"
     pm_10_0:
       name: "PM10.0"
+    aqi:
+      name: "Air Quality Index"
+      calculation_type: "AQI"
 ```
 
 ## Configuration variables
@@ -44,6 +47,11 @@ sensor:
 
   - All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 ## See Also
 
 - [Sensor Filters](/components/sensor#sensor-filters)

content/components/sensor/pmsa003i.md

@@ -38,6 +38,9 @@ sensor:
       name: "PMC >5µm"
     pmc_10_0:
       name: "PMC >10µm"
+    aqi:
+      name: "Air Quality Index"
+      calculation_type: "CAQI"
 ```
 
 ## Configuration variables
@@ -69,6 +72,11 @@ sensor:
 - **pmc_10_0** (*Optional*): Count of particles with diameter > 10 um in 0.1 L of air (#/0.1L).
   All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 - **standard_units** (*Optional*, boolean): `True` to use standard units or `False` to use environmental units. Defaults to `True`.
 - **address** (*Optional*, int): Manually specify the I²C address of the sensor.
   Defaults to `0x12`.

content/components/sensor/sds011.md

@@ -30,6 +30,9 @@ sensor:
       name: "Particulate Matter <2.5µm Concentration"
     pm_10_0:
       name: "Particulate Matter <10.0µm Concentration"
+    aqi:
+      name: "Air Quality Index"
+      calculation_type: "AQI"
     update_interval: 5min
 ```
 
@@ -51,6 +54,11 @@ Note that `update_interval` may not be set to `never`.
 - **pm_10_0** (*Optional*): Use the concentration of particulates of size less than 10.0µm in µg per cubic meter.
   All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 - **update_interval** (*Optional*, [Time](/guides/configuration-types#time)): The interval to check the sensor in minutes.
   This affects the working period of the SDS011 sensor. Defaults to `0min`.
 

content/components/sensor/sen5x.md

@@ -32,6 +32,9 @@ sensor:
       name: PM <4µm Weight concentration
     pm_10_0:
       name: PM <10µm Weight concentration
+    aqi:
+      name: Air Quality Index
+      calculation_type: "CAQI"
     temperature:
       name: Temperature
     humidity:
@@ -64,6 +67,11 @@ sensor:
 
   - All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 - **auto_cleaning_interval** (*Optional*): Reads/Writes the interval in seconds of the periodic fan-cleaning.
 
 - **temperature** (*Optional*): Temperature.Note only available with Sen54 or Sen55. The sensor will be ignored on

content/components/sensor/sm300d2.md

@@ -45,6 +45,9 @@ sensor:
       name: "SM300D2 PM2.5 Value"
     pm_10_0:
       name: "SM300D2 PM10 Value"
+    aqi:
+      name: "SM300D2 Air Quality Index"
+      calculation_type: "AQI"
     temperature:
       name: "SM300D2 Temperature Value"
     humidity:
@@ -74,6 +77,11 @@ sensor:
 
   - All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 - **temperature** (**Required**): The information for the temperature sensor. Readings in degrees celsius (°C).
 
   - All options from [Sensor](/components/sensor).

content/components/sensor/sps30.md

@@ -48,6 +48,9 @@ sensor:
     pm_size:
       name: "Typical Particle size"
       id: "pm_size"
+    aqi:
+      name: "Air Quality Index"
+      calculation_type: "AQI"
     address: 0x69
     update_interval: 10s
 ```
@@ -94,6 +97,11 @@ sensor:
 
   - All options from [Sensor](/components/sensor).
 
+- **aqi** (*Optional*): Air Quality Index sensor. Requires both `pm_2_5` and `pm_10_0` sensors to be configured.
+
+  - **calculation_type** (**Required**): The AQI calculation standard to use. One of: `AQI` (US EPA) or `CAQI` (European).
+  - All other options from [Sensor](/components/sensor).
+
 - **auto_cleaning_interval** (*Optional*): The interval in seconds of the periodic fan-cleaning.
 
 - **address** (*Optional*, int): Manually specify the I²C address of the sensor.