fix(esp_websocket_client): reference protocol_examples_common from IDF

This makes the 'target' example usable from the component registry.
'linux' example still has a bunch of EXTRA_COMPONENT_DIRS, but at
least we can delete the protocol_examples_common copy.

Author: igrr

components/esp_websocket_client/examples/linux/CMakeLists.txt

@@ -8,7 +8,6 @@ set(EXTRA_COMPONENT_DIRS
   "${common_component_dir}/linux_compat"
   "${common_component_dir}/linux_compat/freertos")
 
-list(APPEND EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
 list(APPEND EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/protocols/linux_stubs/esp_stubs)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 

components/esp_websocket_client/examples/linux/main/idf_component.yml

@@ -0,0 +1,3 @@
+dependencies:
+  protocol_examples_common:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_common

components/esp_websocket_client/examples/target/CMakeLists.txt

@@ -2,8 +2,5 @@
 # in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.5)
 
-# This example uses an extra component for common functions such as Wi-Fi and Ethernet connection.
-list(APPEND EXTRA_COMPONENT_DIRS "../../../../common_components/protocol_examples_common")
-
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(websocket_example)

components/esp_websocket_client/examples/target/main/idf_component.yml

@@ -4,3 +4,5 @@ dependencies:
   espressif/esp_websocket_client:
     version: "^1.0.0"
     override_path: "../../../"
+  protocol_examples_common:
+    path: ${IDF_PATH}/examples/common_components/protocol_examples_common