Initial cut of Matter camera app (#37625)

* Initial structure of camera-app

* Add camera-app.zap and .matter files.

Add chime server support.

Add Chime cluster in the Camera endpoint in .zap config.
Add delegate implementation of chime cluster.

* Fix missing device type id in .zap and .matter files for camera device endpoint.

* Create a source set for the common camera app files.

Also,
- Add build support into gn_build.sh.
- Change executable name to chip-camera-app.

* Add camera.md in docs

Author: pidarped

BUILD.gn

@@ -394,6 +394,10 @@ if (current_toolchain != "${dir_pw_toolchain}/default:default") {
     enable_linux_rvc_app_build =
         enable_default_builds && (host_os == "linux" || host_os == "mac")
 
+    # Build the Linux Camera app example.
+    enable_linux_camera_app_build =
+        enable_default_builds && (host_os == "linux" || host_os == "mac")
+
     # Build the cc13x2x7_26x2x7 lock app example.
     enable_cc13x2x7_26x2x7_lock_app_build = enable_ti_simplelink_builds
 
@@ -783,6 +787,15 @@ if (current_toolchain != "${dir_pw_toolchain}/default:default") {
     extra_build_deps += [ ":linux_rvc_app" ]
   }
 
+  if (enable_linux_camera_app_build) {
+    group("linux_camera_app") {
+      deps =
+          [ "${chip_root}/examples/camera-app/linux(${standalone_toolchain})" ]
+    }
+
+    extra_build_deps += [ ":linux_camera_app" ]
+  }
+
   group("default") {
     deps = extra_build_deps + builds
   }

docs/examples/camera.md

@@ -0,0 +1,8 @@
+## Camera
+
+```{toctree}
+:glob:
+:maxdepth: 1
+
+camera-app/**/README
+```

examples/camera-app/camera-common/BUILD.gn

@@ -0,0 +1,40 @@
+# Copyright (c) 2025 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("${chip_root}/src/app/chip_data_model.gni")
+
+config("config") {
+  include_dirs = [ "include" ]
+}
+
+chip_data_model("camera-common") {
+  zap_file = "camera-app.zap"
+  is_server = true
+}
+
+source_set("camera-lib") {
+  public_configs = [ ":config" ]
+
+  sources = [
+    "include/camera-app.h",
+    "include/camera-device-interface.h",
+    "src/camera-app.cpp",
+  ]
+
+  deps = [
+    "${chip_root}/examples/camera-app/camera-common",
+    "${chip_root}/src/lib",
+  ]
+}