Refactor the code handling WS data event to remove code duplication and fix the usages of pinfo->opcode in examples #635

Job	Run time
ESP32 (pio) - Arduino 2 (esp32dev)	2m 12s
ESP32 (arduino-cli) - Release	2m 15s
ESP32 (arduino-cli) - Dev	2m 15s
ESP32 (pio) - Arduino 2 (esp32-s2-saola-1)	2m 16s
ESP32 (pio) - Specific Envs (ci-arduino-2-esp-idf-log)	2m 11s
ESP32 (pio) - Specific Envs (ci-regex)	2m 16s
ESP32 (pio) - Arduino 3 (esp32-s3-devkitc-1)	2m 10s
ESP32 (pio) - Specific Envs (ci-latest-asynctcp)	2m 14s
ESP32 (pio) - Specific Envs (ci-arduino-3-esp-idf-log)	2m 2s
ESP32 (pio) - Arduino 2 (esp32-s3-devkitc-1)	2m 2s
ESP32 (pio) - Arduino 3 (esp32-c3-devkitc-02)	2m 15s
ESP32 (pio) - Arduino 2 (esp32-c3-devkitc-02)	2m 2s
ESP32 (pio) - Arduino 3 (esp32-c6-devkitc-1)	2m 16s
ESP32 (pio) - Arduino 3 (esp32dev)	2m 15s
ESP32 (pio) - Arduino 3 (esp32-p4)	7s
ESP32 (pio) - Arduino 3 (esp32-s2-saola-1)	1s
ESP32 (pio) - Arduino 3 (esp32-h2-devkitm-1)	1s
ESP32 (pio) - Specific Envs (ci-no-json)	2m 14s
ESP32 (pio) - Specific Envs (ci-no-chunk-inflight)	2m 2s
	35m 6s

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