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/protocols/sockets/udp_client/CMakeLists.txt

@@ -3,12 +3,7 @@
 cmake_minimum_required(VERSION 3.16)
 
 if("${IDF_TARGET}" STREQUAL "linux")
-    # This example uses an extra component with common functionality for lwip's port on linux target
-    set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_tapif_io)
     set(COMPONENTS main esp_netif lwip protocol_examples_tapif_io startup esp_hw_support esp_system nvs_flash)
-else()
-    # This example uses an extra component for common functions such as Wi-Fi and Ethernet connection on ESP target
-    set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
 endif()
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)

examples/protocols/sockets/udp_client/main/idf_component.yml

@@ -0,0 +1,9 @@
+dependencies:
+  protocol_examples_tapif_io:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_tapif_io
+    rules:
+      - if: "target in [linux]"
+  protocol_examples_common:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_common
+    rules:
+      - if: "target not in [linux]"