Add airquality example (#28447)

* initial implementation of air-quality-sensor-app

* added AirQuality device endpoint

* corrected device type

* rename AirQualitySensorAppCommandHandler to avoid confusion with CommandHandlerInterface

* Restyled by whitespace

* Restyled by clang-format

* Restyled by gn

* Restyled by prettier-markdown

* fixed toc issue in readme

* fixed zap generate issue

* delete AirQualitySensorAttrUpdateHandler and code tidy up

* added air-quality-sensor-app to examples/index.md toctree

* changed concentrator to concentration

* removed unused Ui::Windows

* fixed spelling

* fixed doc build error

* fixed doc build error

* fixed spelling in README

* removed unused clusters and fixed cluter revisions

* removed DiagnosticLogs

* regenerate air-quality-sensor-app.matter after merging master

* readme spelling and restyle

* fixed cluster revisions

* code tidy up

* Restyled by clang-format

* regenerated matter file

* fixed min/max value updates

* removed min max function maps

---------

Co-authored-by: Restyled.io <commits@restyled.io>

docs/examples/index.md

@@ -3,6 +3,15 @@
 The Matter SDK provides examples of Matter devices for different development
 platforms.
 
+## Air Quality Sensor example
+
+```{toctree}
+:glob:
+:maxdepth: 1
+
+air-quality-sensor-app/**/README
+```
+
 ## All clusters example
 
 ```{toctree}

examples/air-quality-sensor-app/air-quality-sensor-common/BUILD.gn

@@ -0,0 +1,24 @@
+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build_overrides/chip.gni")
+import("${chip_root}/src/app/chip_data_model.gni")
+
+chip_data_model("air-quality-sensor-common") {
+  zap_file = "air-quality-sensor-app.zap"
+
+  zap_pregenerated_dir =
+      "${chip_root}/zzz_generated/air-quality-sensor-app/zap-generated"
+  is_server = true
+}