feat(examples): add local components via idf_component.yml

Specifying all the dependencies (managed and local) in the manifest
makes it easier for users to see every component the example
depends on.

examples/zigbee/esp_zigbee_gateway/CMakeLists.txt

@@ -3,6 +3,5 @@
 # The following five lines of boilerplate have to be in your project's
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.16)
-set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(esp_zigbee_gateway)

examples/zigbee/esp_zigbee_gateway/main/idf_component.yml

@@ -5,3 +5,5 @@ dependencies:
   ## Required IDF version
   idf:
     version: ">=5.0.0"
+  protocol_examples_common:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_common